Alternatives To Boolean Arguments

Define argument. An alternative method of converting a string into a number is to use one of the global functions designed to parse a string and return a number. Although every concrete Boolean algebra is a Boolean algebra, not every Boolean algebra need be concrete. The reality is that this means that your Button component would better have been called MasterButtonSwitch since it has to juggle a lot depending on its arguments. While not increasing the actual resolution of the spectrum (the minimum distance between resolvable peaks), this can give more points in the plot, allowing for more detail. Alternatives # To be accurate, there's more than one catamorphism for Boolean values. This java tutorial focuses on the usage of the Scanner class of java. If you’ve ever used GMail or Yahoo Mail, you. If you have an argument that just turns a feature on or off, then you must use the boolean type, as with the --verbose flag in the sample code. To use sys. you would simply remake it. Conditional statements belong to the basic programming tasks. Although traditional categorical logic can be used to represent and assess many of our most common patterns of reasoning, modern logicians have developed much more comprehensive and powerful systems for expressing rational thought. Arguments can trigger different actions, specified by the action argument to add_argument(). Read more about this in description of constructor's arguments. The programmer probably wanted to print the details only when there are fewer than 10 items in the order, otherwise the printout was getting too long. contains() method returns true if and only if this string contains the specified sequence of char values. If both input values are true (non-zero), the output value is 1. Each finder method allows you to pass arguments into it to perform certain queries on your database without writing raw SQL. Logical Fallacies When you attempt to employ logic to support claims in your papers, your reasoning is sometimes weakened because you are presenting fallacious arguments. The toString() method returns a boolean value as a string. argparse is a complete argument processing library. If you specify multiple filters, they are applied in the order of their appearance in the configuration file. There are alternative spellings for several operators and other tokens that use non-ISO646 characters. For Newsletter. The return must be a tuple of two elements. If it is not annotated, then it is assumed to have the type of the containing class for instance methods, and a type object type corresponding to the containing class object for class methods. The first being the QuerySet and the second being a boolean; note that modified QuerySet will only be used if the boolean is True. The mechanism of contract annotations allows creating APIs that could be consumed in easier and safer way. The boolean operators function in a similar way to the comparison operators: each returns 0 if evaluates to FALSE or 1 if it evaluates to TRUE. That’s when Boolean search fits in perfectly. Arguments also have names, which can also be used as an alternative flag on the command line, this time preceded by two dashes (--) [like the familiar getopt_long()]. The third parameter is the description of the option. References. If the option is used, then stored_true is activated. The programmer probably wanted to print the details only when there are fewer than 10 items in the order, otherwise the printout was getting too long. What kind of conditional operator requires three arguments: a test expression, and true and false result expressions? What conditional operator can be used to create a compound Boolean expression as an alternative to if statements? AND. The Boolean expression examples here are generally the style of expression that are used to enable dynamic SSIS package operations. A jq program is a “filter”: it takes an input, and produces an output. Let's imagine that you're in your Slack team's engineering channel and everyone just got a poll asking for feedback on the most recent Sprint Retrospective meeting - but none of the options the author has given you are on par with your opinions and there is no easy way to add comments, answer open-endedly, or add in your option without being booted off to th…. The top command allows users to monitor processes and system resource usage on Linux. The HTTP POST method is defined in section 9. A filter argument overrides the existing corresponding filters over the same column(s), unless it is embedded within KEEPFILTERS. A condition is a boolean With this you can optionally provide an alternative execution path that will be followed if the condition. As I wrote before a boolean evaluation of a string is different to the evaluation of a boolean. How do I evaluate an argument? An argument is a conclusion based upon evidence (i. The double negation ~~ is just there to turn any lua value into an actual boolean and you might want to skip it if the exact type is not relevant in your code. Written by co-founder Kasper Langmann, Microsoft Office Specialist. Labels must be less than 256 bytes long. Conditional statements belong to the basic programming tasks. Boolean arguements allows a search to be broadened or narrowed as desired. For example:. It lets you pass strings as diverse as “Jan 19, 1991”, “5/26/1998” and “2002, Feb 04”. It is one of the most useful tools in a sysadmin’s toolbox, and it comes pre-installed on every distribution. If you specify multiple filters, they are applied in the order of their appearance in the configuration file. The boolean compress argument indicates whether to use the compressed client/server protocol (default False). All objects that implemented __cmp__ must be updated to implement all of the rich methods instead. trouble setting a Boolean parameter. An AtomicBoolean is used in applications such as atomically updated flags, and cannot be used as a replacement for a Boolean. Wadsworth, 2010). Your argument will need to be more than a simple or obvious statement such as “Frank Lloyd Wright was a great architect. Assigning variables as properties of the element. * Compares this string to the specified object. An exception is the first argument of instance and class methods. Each finder method allows you to pass arguments into it to perform certain queries on your database without writing raw SQL. The argparse module improves on the standard library optparse module in a number of ways including: Handling positional arguments. If you follow my suggestion below on never comparing against boolean constants, then you only need to use 0/1 to initialize the flags anyway. If it proves too difficult to solve in the available time, it may be wise to take a simple approach such as avoiding dynamic dispatch in Version 1 of XML Query. How To Use The Excel Functions TRUE And FALSE (Boolean Logic) Written by co-founder Kasper Langmann, Microsoft Office Specialist. As the value of the errornew1 variable is changed (in this case, by clicking the two buttons), the color of the label is toggled between blue and red. SQL WHERE clauses: Avoid CASE, use Boolean logic. There are many functions in Microsoft Excel that are conditional by nature. Lipmaa [Lip12] used an alternative con-struction based on progression-free sets to reduce the size of the common reference string. edu is a platform for academics to share research papers. argument synonyms, argument pronunciation, argument translation, English dictionary definition of argument. Logical operators. 21120 Many systems provide the ability to have alternatives to visual or other sensory attributes (such as color or sound) for the purpose of accessibility (for example a picture to be displayed on a Web page may have a textual alternative that could be read by a text-to-speech peripheral for the usually impaired). The Purdue Online Writing Lab Welcome to the Purdue OWL. For example lets say that the value of the String s is “Hi there” and we are calling starsWith() method like this – s. I use Boolean Solid operations for that. jq Manual (development version) For released versions, see jq 1. If you follow my suggestion below on never comparing against boolean constants, then you only need to use 0/1 to initialize the flags anyway. They allow us to decide whether or not to run a piece of code. Conditional statements belong to the basic programming tasks. It’s used in social listening tools, search engines, and other apps. The rows prop allows you to define how many rows the textarea has, when combined with the row-height prop you can further customize your rows by defining their height. Dual Alternative Decision Structures Chapter 4. Learn more about how the Boolean math tools work. 1, and in the next section, we redefine these concepts in terms of truth functions calculated by means of truth tables. That’s when Boolean search fits in perfectly. How do I evaluate an argument? An argument is a conclusion based upon evidence (i. The programmer probably wanted to print the details only when there are fewer than 10 items in the order, otherwise the printout was getting too long. As an alternative,. However, naming a parameter is generally not required in most languages. The false keyword is a constant boolean literal, meaning it is a value that can be stored in a variable. The alternative is to allow also partial matches. You can view the examples in SQL Server Books Online to see how to do this by using pre-defined Transact-SQL strings, but there are no examples of how to pass a variable to these functions. argv, you will first have to import the sys module. We can use them for other objects as well. This tutorial explains the difference between the SUMIF and SUMIFS functions in terms of their syntax and usage, and provides a number of formula examples to sum values with multiple AND / OR criteria in Excel 2016, 2013, 2010, 2007, 2003 and lower. matches(element, selector) => boolean. To update the visibility of a view, you have to choose between using a boolean and implementing a ternary in the XML, or setting the appropriate integer in your viewmodel, which requires importing. As some of you may know, I recommend to avoid using CASE expressions in the WHERE clause of a query to express conditional logic. Please modify your formula. drop_duplicates removes duplicate rows. createSetting("userAge", true) You need to look up the function definition to understand this code. IF is a simple function, and people love IF because it gives them the power to make Excel respond as information is entered in a spreadsheet. If you have an argument that just turns a feature on or off, then you must use the boolean type, as with the --verbose flag in the sample code. (If a slash is in an option string, Click automatically knows that it’s a boolean flag and will pass is_flag=True implicitly. Literal strings must be enclosed in double quotation marks. The word “argument” can be used to designate a dispute or a fight, or it can be used more technically. Now, in real life, we might say: that's not a valid argument. Most of the time, named arguments are useful on the command line when you have a long argument list and you want to use the defaults for everything except for an argument near the end of the list Named arguments also help if you can remember the name of the argument and not its position on the argument list (plotting is a good example). A callable function with one argument (the calling Series or DataFrame) and that returns valid output for indexing (one of the above) See more at Selection by Label. They indicate that a function does more than one thing, and a good function should do only one thing. This is useful if you didn't know you had any. The algebra of Boolean games modulo strategic equivalence is then proven to be isomorphic to the Lindenbaum algebra of Classical Propositional Logic. Defining Arguments¶. In unpackMap, the number of arguments must be even. The CoffeeScript on the left is editable, and the JavaScript will update as you edit. 7 is not found. For a function with n boolean arguments, there are 2n different pos-sible inputs. Argparse4j is available in Maven central repository:. , switch and call). The difference between [Switch] and[Bool] in Powershell function parameters #boolean parameter Missing an argument for parameter 'someVariable'. argument synonyms, argument pronunciation, argument translation, English dictionary definition of argument. So you just need to. One alternative would be to extend the AddItemFromStringAction adding the condition as another argument, overriding the execute method to call the base implementation depending on the condition argument. How to Use Google Alerts Plus (12 Powerful Alternatives) - 2019 How do you keep up-to-date with all the mentions of you and your brand or competitors? And how do you keep tabs on the latest trends in your industry or niche?. You cannot use a boolean variable in SQL because the SQL Engine doesn't support them where as the PL/SQL Engine does. This can be done with a string, a RegExp, a function that is getting the module's source as an argument and returns a boolean. For example, the first argument of the IF function in row 4 — the logical test argument — is required to return a Boolean value as an answer. A BOOLEAN VALUE is a data type that contains either the value TRUE or the value FALSE. In this article, I wanted to take the opportunity to talk about a scenario that may be "edge case" but a case just the same within the constructs of leveraging switch parameters in PowerShell workflow. A docopt implementation will extract all that information and generate a command-line arguments parser, with the text of the interface description as the help message shown when the program is invoked with the -h or --help options. This article provides three examples of how to pass a variable to a linked server query. Sets the nice name of the attribute for display in the UI. Example To show how this works. drop_duplicates removes duplicate rows. IF function is one of the most used functions in Excel. func(args) after we parse the arguments at runtime. When a Boolean value needs to be normalized to one of two values, bool(x) is much clearer than "not not x" and much more concise than. Alternative tokens. 2) and previews/views of your custom post will return 404s. frame, choice. It’s perfectly normal for couples to argue. Text is considered identical if the size and content of each are the same. Also kno as the algebra of logic and as. This, however, comes at a cost of behaving differently from all other functions in R. This java tutorial focuses on the usage of the Scanner class of java. The input arguments can be any combination of string arrays, character vectors, and cell arrays of character vectors. In contrast to other canonical representations of Boolean functions, such as canonical sum-of-products form, however, many "interest-ing" Booleanfunctions are represented byfunction graphs of size polynomial in the numberofarguments. Not == like in C and C influenced languages. However, if you often switch between different scripting languages, such as PHP, JavaScript, and PowerShell, you can easily get confused about the different syntax of their conditional statements. In unpackMap, the number of arguments must be even. We use the term formal parameters to refer to the parameters in the definition of the method. Because of this, it is necessary to distinguish between valid arguments and sound arguments. It is easy for machines to parse and generate. They have various reasons for their choice, though sometimes this choice may be based on false assumptions. So my first formula violates the rule that a column name is required on the left. The first line sets up a Boolean variable called ReturnValue. A filter argument overrides the existing corresponding filters over the same column(s), unless it is embedded within KEEPFILTERS. The return must be a tuple of two elements. From your comment on one of the other answers: > My boss told me to avoid flag/boolean driven logic and stick to environment driven logic. The column location of the numeric data. I thought I would introduce a new test based on SQL Server 2012 to see if my results show anything different. Supported actions include storing the argument (singly, or as part of a list), storing a constant value when the argument is encountered (including special handling for true/false values for Boolean switches), counting the number. You cannot use a boolean variable in SQL because the SQL Engine doesn't support them where as the PL/SQL Engine does. However, if you often switch between different scripting languages, such as PHP, JavaScript, and PowerShell, you can easily get confused about the different syntax of their conditional statements. Its general design, however, has enabled it to be adapted, over the subsequent years, to describe a number of other types of documents and even applications. The parenthesised code should certainly return a Boolean value. Hole's dimensions : 25um x 25um x 1cm. A value identifying the row location of the numeric data. CALCULATE expects its filter arguments to take the form of Column=Fixed Value, or >Fixed Value, <= Fixed Value, etc. This article provides three examples of how to pass a variable to a linked server query. Go ahead - try it. Even when there is a Boolean simplification, many sys-tems can be studied with near-binary states. public void setForceFormulaRecalculation(boolean value) Control if Excel should be asked to recalculate all formulas on this sheet when the workbook is opened. All tools inherit arguments from the GATK Engine' "CommandLineGATK" argument collection, which can be used to modify various aspects of the tool's function. First developed in the mid-1800s by mathematician George Boole, Boolean logic is a formal, mathematical approach to decision-making. MS Excel: How to use the ISERROR Function (WS, VBA) This Excel tutorial explains how to use the Excel ISERROR function with syntax and examples. Major sequence database sources defined as standard in EMBOSS installations include srs:embl, srs:uniprot and ensembl. Many systems provide the ability to have alternatives to visual or other sensory attributes (such as color or sound) for the purpose of accessibility (for example a picture to be displayed on a Web page may have a textual alternative that could be read by a text-to-speech peripheral for the usually impaired). combined these techniques with ideas from interactive zero-knowledge arguments [Gro09] to give the rst constant size NIZK arguments. Description. Bash variables don't have types, so there's no such thing as a boolean variable or value like true or false. Boolean values are values that evaluate to either true or false, and are represented by the boolean data type. Argument To The Future: arguing that evidence will someday be discovered which will (then) support your point. If you’ve ever used GMail or Yahoo Mail, you. Here's what the createSetting call would look like using an options object: settings. Example To show how this works. Join our email list to get exclusive contents & latest updates right in your inbox. When used to determine the flow of control in a selection or iteration construct, short-circuit Boolean expressions do not really have to calculate a Boolean value; they simply have to ensure that control takes the proper path in any given situation. If the method has arguments but you really don't care what gets passed or cannot predict it, use anyInt() (and alternative values for other types). Hi, I found myself in a situation where I needed to create Boolean expressions with only one argument (changing the template to "<1>"). This is useful if you didn't know you had any. In the example that follows, x and y are the formal parameters. Checks a selector against an element, returning a boolean value for match. 19 tips for nested IF formulas The IF function is one of the most heavily used functions in Excel. A JSON object is an unordered collection of key/value pairs. as formal proofs of arguments, as well as tests of validity and satisfiability using truth trees. 2 A Brief History of Boolean Algebra from Boole to Peirce, Venn, and Huntington Boolean algebra derives its name in honor of George Boole [4]. Basically all bash variables are just strings. Groth’s constant size NIZK argument is based on constructing a set of polyno-. Primitive functions are only found in the base package, and since they operate at a low level, they can be more efficient (primitive replacement functions don’t have to make copies), and can have different rules for argument matching (e. There are two validation constraints for. First proposed by author Stephen Toulmin in The Uses of Argument (1958), the Toulmin Method emphasizes building a thorough support structure for each of an argument's key claims. When the value of the expression is YES, commas are used. you would simply remake it. It can also be evaluated in an if-expression. I have a custom environment which adds some text around its content, but I also want it to be able to show or hide its contents depending on a boolean. As the value of the errornew1 variable is changed (in this case, by clicking the two buttons), the color of the label is toggled between blue and red. Syntax isNaN(value) Parameters value The value to be tested. 10) and might not apply as-is to recent Hive releases. public boolean isValid(String value) { return "123". Conditional statements belong to the basic programming tasks. What could true possibly mean here? settings. When using this class as opposed to new platform's built-in fragment and loader support, you must use the getSupportFragmentManager() and getSupportLoaderManager() methods respectively to access those features. And here's a quick fact: you don't have to capitalize Boolean operators on any of the major job boards and many of the major ATS's. Ownership of the callback is taken by ConcatenateOperators. The toString() method returns a boolean value as a string. The analyzer will detect situations where a class, or the keywords ‘array’ or ‘callable’. Finally we execute the default function by calling args. grep, grepl, regexpr, gregexpr and regexec search for matches to argument pattern within each element of a character vector: they differ in the format of and amount of detail in the results. The arguments to the SUBSTR function are as follows:. You can view the examples in SQL Server Books Online to see how to do this by using pre-defined Transact-SQL strings, but there are no examples of how to pass a variable to these functions. The SUBSTR function takes a character matrix as an argument (along with starting positions and lengths) and produces a character matrix with the same dimensions as the argument. Google’s Help provides a partial list of Google operators. A filter argument in CALCULATE is always an iterator. What is Boolean Operator? Boolean operators are simply a set of different operators that could be used to compare expressions. target keywords. argparse is a complete argument processing library. Applications. The conjunctive identity is true, which is to say that AND-ing an expression with true will never change the value of the expression. The column number is the number of the column as it is listed in the Column Specification view of the DataWindow painter—not necessarily the number of the column in the. The second parameter says where the setting should be stored. The term "Boolean," often encountered when doing searches on the Web (and sometimes spelled "boolean"), refers to a system of logical thought developed by the English mathematician and computer pioneer, George Boole (1815-64). However, it is not possible to pass a function that calculates the gradient. You can add parameters to the advanced functions that you write, and use parameter attributes and arguments to limit the parameter values that function users submit. */ fun varargExample (vararg names: Int) {println ("Argument has ${names. The CMISS function can have multiple arguments and returns a count of the missing values. You could flip the arguments, and it would still be a catamorphism. Function-call abstraction. Years ago, we first wrote up this technique in the context of Power Pivot. Example To show how this works. Description The necessity of an isNaN function. Table of Contents. The result is {@code * true} if and only if the argument is not {@code null} and is a {@code. In the example that follows, x and y are the formal parameters. Calculating the formula values with FormulaEvaluator is the recommended solution, but this may be used for certain cases where evaluation in POI is not possible. BigInteger formatting. Index: mutt/ChangeLog diff -u mutt/ChangeLog:3. It is not the difference between a Procedure and a Function; it is the difference between SQL and PL/SQL. How To Use The Excel Functions TRUE And FALSE (Boolean Logic) Written by co-founder Kasper Langmann, Microsoft Office Specialist. The method takes two arguments: QuerySet, and is_descending. Some think that ISNULL is always faster than. You can change literals used for boolean operators and parens. Return value. Notice that the relational operators are not limited to numbers. Join There are alternatives available in the. First let's get the terminology straight. This is a variation of Ad Hominem. Many systems provide the ability to have alternatives to visual or other sensory attributes (such as color or sound) for the purpose of accessibility (for example a picture to be displayed on a Web page may have a textual alternative that could be read by a text-to-speech peripheral for the usually impaired). The operator ToPrimitive takes a Value argument and an optional argument PreferredType. Assigning variables as properties of the element. (1) Does 2 = 3 imply 2 + 1 = 3 + 1? Yes, it’s an example of the rule x= yimplies x+1 = y+1. In the lambda calculus, a Boolean value is function that takes two arguments and returns the left-hand argument when true, and the right-hand argument when false. ) Click always wants you. The difference between [Switch] and[Bool] in Powershell function parameters #boolean parameter Missing an argument for parameter 'someVariable'. There are many functions in Microsoft Excel that are conditional by nature. There are a lot of builtin filters for extracting a particular field of an object, or converting a number to a string, or various other standard. If desired, the assert keyword can be used to verify private method arguments, to check the internal consistency of the class. In C, the bit-wise & and | operators can be used as non–short-circuiting alternatives to && and || when their arguments are logical (0 or 1) values. You could flip the arguments, and it would still be a catamorphism. Then when the function is executed, it can look for these properties on the element, referenced using the 'this' keyword. If one or both inputs are false (zero), the output is 0. How to Use Google Alerts Plus (12 Powerful Alternatives) – 2019 How do you keep up-to-date with all the mentions of you and your brand or competitors? And how do you keep tabs on the latest trends in your industry or niche?. withTheme (Boolean [optional]): Defaults to false. Argparse4j is available in Maven central repository:. An If-statement does not always directly test values. In Java, if a calling method passes a reference of an object as an argument to the called method then the passed-in reference gets copied first and then passed to the called method. 697-698 http://www. Custom Argument ArgumentMatchers. And here’s a quick fact: you don’t have to capitalize Boolean operators on any of the major job boards and many of the major ATS’s. , Chambers, J. But I have faced a problem : I have a plate with dimensions : 30cm x 30cm x 1cm. However, all arguments must evaluate to the Boolean values of TRUE or FALSE, or references or arrays containing logical values. Can you randomly choose a Boolean's value in Unity C#. It empowers users to construct, navigate, share and criticize knowledge models represented as concept maps. Here’s what you’ll learn in this tutorial: In Python 3, there is effectively no limit to how. A few thoughts on booleans in C: I'm old enough that I just use plain ints as my boolean type without any typedefs or special defines or enums for true/false values. References. This is useful if you didn't know you had any. 19 tips for nested IF formulas The IF function is one of the most heavily used functions in Excel. Correct comment to put for boolean function arguments that are "false"? Ask Question @Brandon That is not an argument against calling the boolean doNotPersist (or, better, Persist). Wadsworth & Brooks/Cole. * Compares this string to the specified object. It lets you pass strings as diverse as “Jan 19, 1991”, “5/26/1998” and “2002, Feb 04”. From self driving cars to face recognition on Facebook, it is machine learning behind the scenes that drives all of it. This is because the multiplication * operator binds stronger, and precedes the addition operator +. Specifically, show how Boolean algebra can be used as a basis for analyzing multiple con junctural causation. 10) and might not apply as-is to recent Hive releases. The difference between them has to do with what is called “operator precedence”. The final argument of a variadic operation is also considered to be an optional argument. Most of the time, named arguments are useful on the command line when you have a long argument list and you want to use the defaults for everything except for an argument near the end of the list Named arguments also help if you can remember the name of the argument and not its position on the argument list (plotting is a good example). The BOOLEAN type is optional (has feature ID T031), which is a bit surprising for such a basic type. So you will get a call like: rsaProvider. Use the Boolean Data Type (Visual Basic) to contain two-state values such as true/false, yes/no, or on/off. The reality is that this means that your Button component would better have been called MasterButtonSwitch since it has to juggle a lot depending on its arguments. The SUBSTR function takes a character matrix as an argument (along with starting positions and lengths) and produces a character matrix with the same dimensions as the argument. Here is an example of what I'm trying to do: Boolean = (random boolean value command)(fa. between each hole 50um I need a lot of holes. The MISSING function can have only one argument. [True, False, True]. If the method has arguments but you really don't care what gets passed or cannot predict it, use anyInt() (and alternative values for other types). The CoffeeScript on the left is editable, and the JavaScript will update as you edit. However, it is not possible to pass a function that calculates the gradient. Ruby supports a rich set of operators, as you'd expect from a modern language. So I am proposing an alternative… Going manual without ConfigureAwait(false) “Run Case 3” What if we did what ConfigureAwait() does for us, but we do it once at the beginning of our callstack and didn’t have to think about it again? Unfortunately, that means not using a fluent API. Also kno as the algebra of logic and as. A string template method that allows you to fill a string with data. The BOOLEAN type is optional (has feature ID T031), which is a bit surprising for such a basic type. Flag arguments are a code smell. Alternative tokens. Join our email list to get exclusive contents & latest updates right in your inbox. You can check either the value type using the e. The elementwise operators are sometimes called as functions as e. org/conf/2001/P697. argument synonyms, argument pronunciation, argument translation, English dictionary definition of argument. It is not the difference between a Procedure and a Function; it is the difference between SQL and PL/SQL. Boolean arguments are very hard to read, and thus difficult to maintain. NOT: The NOT operator accepts one input. But in fact, this is a valid argument in logic. Most programs use stacks implicitly because they support a natural way to implement function calls, as follows: at any point during the execution of a function, define its state to be the values of all of its variables and a pointer to the next instruction to be executed. If XQuery supports dynamic dispatch, is it based on all the arguments of a function or on only one distinguished argument? Observation: This is a very complex area of language design. As we already mentioned, the relational operators return boolean values. If false, an elapsed timer unit that cannot elapse anymore is unloaded. combined these techniques with ideas from interactive zero-knowledge arguments [Gro09] to give the rst constant size NIZK arguments. The command names provided are the same as in the standard package, and they use the same internal functions. Supporting sub-commands. The nice thing working for Trolltech was (among others) learning the principles behind the good API. These types of formulas are very powerful in their simplicity. Give your boolean variables positive names, ie full instead of notfull. qfalse when pis false, our only alternative is to call it true.