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All Boolean Solutions on Gang of Coders
Total of 177 Boolean Solutions
Which MySQL data type to use for storing boolean values
Mysql
Boolean
Sqldatatypes
How can I declare and use Boolean variables in a shell script?
Bash
Shell
Scripting
Boolean
Sh
Converting from a string to boolean in Python?
Python
String
Boolean
Parsing boolean values with argparse
Python
Boolean
Argparse
Command Line-Arguments
Using boolean values in C
C
Boolean
Truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all()
Python
Pandas
Dataframe
Boolean
Filtering
What is the printf format specifier for bool?
C++
C
Boolean
Printf
Check if at least two out of three booleans are true
Java
Boolean
Boolean Logic
How to toggle a boolean?
Javascript
Boolean
Toggle
Is there a Boolean data type in Microsoft SQL Server like there is in MySQL?
Sql Server
Types
Boolean
Convert boolean to int in Java
Java
Casting
Boolean
Int
How to convert string to boolean php
Php
String
Casting
Boolean
How do you create a yes/no boolean field in SQL server?
Sql Server
Boolean
Sqldatatypes
Convert boolean result into number/integer
Javascript
Numbers
Integer
Boolean
Type Conversion
What is the difference between bool and Boolean types in C#
C#
Types
Boolean
How to convert String object to Boolean Object?
Java
String
Boolean
Is there any boolean type in Oracle databases?
Sql
Database
Oracle
Boolean
Sqldatatypes
Strange definitions of TRUE and FALSE macros
C++
C
Macros
Boolean
Obfuscation
Default value of 'boolean' and 'Boolean' in Java
Java
Boolean
Default Value
Is bool a native C type?
C
Gcc
Linux Kernel
Boolean
Volatile boolean vs AtomicBoolean
Java
Concurrency
Boolean
Volatile
Atomicboolean
Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?
Python
Boolean
Equality
Language Specifications
Returning a boolean from a Bash function
Bash
Shell
Boolean
How to create a numpy array of all True or all False?
Python
Arrays
Numpy
Boolean
Numpy Ndarray
In JavaScript, why is "0" equal to false, but when tested by 'if' it is not false by itself?
Javascript
Boolean
Why does Boolean.ToString output "True" and not "true"
C#
.Net
Boolean
Logical operators for Boolean indexing in Pandas
Python
Pandas
Dataframe
Boolean
Filtering
Boolean vs boolean in Java
Java
Boolean
How do I use boolean variables in Perl?
Perl
Boolean
How can I map True/False to 1/0 in a Pandas DataFrame?
Python
Pandas
Dataframe
Numpy
Boolean
Cleanest way to toggle a boolean variable in Java?
Java
Boolean
How to count the number of true elements in a NumPy bool array
Python
Arrays
Numpy
Count
Boolean
bash "if [ false ];" returns true instead of false -- why?
Bash
Boolean
Conditional Operator
JS generate random boolean
Javascript
Random
Boolean
What is the difference between & and && in Java?
Java
Operators
Boolean
Bitwise Operators
PHP - Get bool to echo false when false
Php
Boolean
Objective-C : BOOL vs bool
C
Objective C
Types
Boolean
Converting string "true" / "false" to boolean value
Javascript
Boolean
How are booleans formatted in Strings in Python?
Python
Boolean
String Formatting
Why is a boolean 1 byte and not 1 bit of size?
C++
Boolean
Byte
Cpu Architecture
Abi
Counting the number of True Booleans in a Python List
Python
List
Boolean
Counting
Return Boolean Value on SQL Select Statement
Sql
Select
Boolean
Get boolean from database using Android and SQLite
Java
Android
Sqlite
Boolean
How to convert a boolean array to an int array
Python
Integer
Boolean
Type Conversion
Scilab
When should null values of Boolean be used?
Java
Boolean
Is there a difference between YES/NO,TRUE/FALSE and true/false in objective-c?
Objective C
Boolean
Ruby: How to convert a string to boolean
Ruby
String
Boolean
Type Conversion
Is there XNOR (Logical biconditional) operator in C#?
C#
Boolean
Boolean Operations
In javascript, is an empty string always false as a boolean?
Javascript
String
Boolean
How do I get the opposite (negation) of a Boolean in Python?
Python
Boolean
Is the operation "false < true" well defined?
C++
Boolean
Language Lawyer
Comparison Operators
C++ : why bool is 8 bits long?
C++
Boolean
Size
Boolean Field in Oracle
Oracle
Boolean
Sqldatatypes
Why does "a == x or y or z" always evaluate to True?
Python
Boolean
Boolean Expression
Why 0 is true but false is 1 in the shell?
Shell
Boolean
Parsing a string into a boolean value in PHP
Php
Parsing
Boolean
Easiest way to flip a boolean value?
C++
C
Boolean
Boolean Logic
ASP.NET MVC Yes/No Radio Buttons with Strongly Bound Model MVC
C#
asp.net Mvc
Model
Radio Button
Boolean
Booleans, conditional operators and autoboxing
Java
Nullpointerexception
Boolean
Conditional Operator
Autoboxing
Why does "sizeof(a ? true : false)" give an output of four bytes?
C
Boolean
Sizeof
Conditional Operator
C11
Double Negation in C++
C++
Boolean
Compact way of writing (a + b == c or a + c == b or b + c == a)
Python
Boolean
What are bitwise operators?
Javascript
Boolean
Bitwise Operators
Boolean Logic
Is sizeof(bool) defined in the C++ language standard?
C++
Boolean
Sizeof
Implementation Defined-Behavior
Boolean.hashCode()
Java
Boolean
Hashcode
Effect of a Bitwise Operator on a Boolean in Java
Java
Boolean
Bitwise Operators
Can I assume (bool)true == (int)1 for any C++ compiler?
C++
Casting
Boolean
Are booleans as method arguments unacceptable?
Coding Style
Boolean
Enumeration
How to print boolean value in Go?
Boolean
Go
Best approach to converting Boolean object to string in java
Java
Boolean
How do I use a Boolean in Python?
Python
Boolean
Java boolean getters "is" vs "are"
Java
Naming Conventions
Boolean
Boolean.valueOf() produces NullPointerException sometimes
Java
Nullpointerexception
Boolean
Why is Java's boolean primitive size not defined?
Java
Boolean
Converting bool to text in C++
C++
String
Boolean
bool operator ++ and --
C++
Boolean
Increment
Boolean identity == True vs is True
Python
Boolean
Jython
Cpython
Pypy
Which is faster : if (bool) or if(int)?
C++
Assembly
Int
Boolean
Checking the value of an Optional Bool
Swift
Boolean
Optional
Alternative to vector<bool>
C++
Stl
Vector
Boolean
BOOLEAN or TINYINT confusion
Mysql
Types
Boolean
Tinyint
Default value of BOOL
Objective C
Initialization
Boolean
Fastest way to generate a random boolean
C#
Performance
Random
Boolean
double equals vs is in python
Python
Comparison
Boolean
Equals
Equality
Declaring a boolean in JavaScript using just var
Javascript
Boolean
C99 boolean data type?
C
Types
Boolean
C99
Is a bool read/write atomic in C#
C#
.Net
Concurrency
Locking
Boolean
Convert True/False value read from file to boolean
Python
String
Boolean
Using bitwise operators for Booleans in C++
C++
Boolean
Bitwise Operators
iOS: Use a boolean in NSUserDefaults
Iphone
Objective C
Boolean
Nsuserdefaults
Modalviewcontroller
Why is bool a subclass of int?
Python
Boolean
Java check if boolean is null
Java
Performance
Boolean
Nullable
What is the size of a boolean variable in Java?
Java
Boolean
How do I undo True = False in python interactive mode?
Python
Boolean
Python 2.x
How to create a boolean value?
Xml
Xslt
Boolean
Xslt 1.0
Xslt 2.0
How do I concatenate a boolean to a string in Python?
Python
String
Casting
Boolean
Concatenation
What is the difference between Convert.ToBoolean(string) and Boolean.Parse(string)?
C#
Parsing
Boolean
SQL Server - boolean literal?
Sql
Sql Server
Boolean
Literals
What is the most elegant way to check if all values in a boolean array are true?
Java
Arrays
Boolean
Get random boolean in Java
Java
Random
Boolean
What does this boolean "(number & 1) == 0" mean?
Java
Methods
Arraylist
Boolean
Int
Convert.ToBoolean and Boolean.Parse don't accept 0 and 1
.Net
Boolean
Should programmers use boolean variables to "document" their code?
Boolean
Conventions
Self Documenting
How do I submit a boolean parameter in Rails?
Ruby on-Rails
Parsing
Parameters
Boolean
Get random boolean true/false in PHP
Php
Random
Boolean
Why is the ternary operator used to define 1 and 0 in a macro?
C++
C
Boolean
Ternary Operator
C++ printing boolean, what is displayed?
C++
Boolean
Cout
Convert String to Bool in Swift - via API or most Swift-like approach
Swift
Boolean
PHP: bool vs boolean type hinting
Php
Boolean
Default Value
Type Hinting
Is there a boolean literal in SQLite?
Sqlite
Boolean
Literals
Is it bad to explicitly compare against boolean constants e.g. if (b == false) in Java?
Java
Coding Style
Boolean
Defining "boolness" of a class in python
Python
Python 2.7
Class
Boolean
Python 2.x
Why use !! when converting int to bool?
C++
Integer
Boolean
in Dart, is there a `parse` for `bool` as there is for `int`?
Parsing
Boolean
Dart
Coercion
Boolean value switch/invert
Php
Boolean
What is the purpose of new Boolean() in Javascript?
Javascript
Boolean
In Java, what are the boolean "order of operations"?
Java
Logic
Boolean
Evaluation
Operator Precedence
Is it Pythonic to use bools as ints?
Boolean
Python
Why does bool and not bool both return true in this case?
C++
Boolean
Comparing boolean and int using isinstance
Python
Int
Boolean
Comparison
Isinstance
Objective-C dictionary inserting a BOOL
Objective C
Dictionary
Boolean
Angular, boolean value in a select box
Javascript
Angularjs
Boolean
Difference between _Bool and bool types in C?
C
Types
Boolean
Return True or False Randomly
Java
Random
Boolean
Boolean operators ( &&, -a, ||, -o ) in Bash
Bash
Shell
Unix
Boolean
Operators
Valid JavaBeans names for boolean getter methods
Java
Boolean
Naming Conventions
Javabeans
How to set default boolean values in JavaScript?
Javascript
Boolean
Python: if not val, vs if val is None
Python
Comparison
Boolean
Readability
Can I 'invert' a bool?
C#
Boolean
True/False vs 0/1 in MySQL
Mysql
Boolean
Convert boolean to integer value php
Php
Integer
Boolean
Type Conversion
Getting a list of indices where pandas boolean series is True
Python
Pandas
Boolean
Series
Boolean Indexing
What's the difference between boolean and Boolean in Java?
Java
Gwt
Boolean
In Java is boolean cast useless?
Java
Types
Boolean
Should I return 0 or 1 for successful function?
C
Boolean
python how to "negate" value : if true return false, if false return true
Python
Boolean
Negate
Does true equal to 1 and false equal to 0?
C++
C
Boolean
Do negative numbers return false in C/C++?
C++
C
Boolean
What does "0 but true" mean in Perl?
Perl
Integer
Boolean
What's the difference between "bool" and "bool?"?
C#
Boolean
Nullable
xsd:boolean element type accept "true" but not "True". How can I make it accept it?
Xml
Xsd
Boolean
Converting from a std::string to bool
C++
String
Boolean
What is the difference between "option" and "set CACHE BOOL" for a CMake variable?
Cmake
Boolean
Global Variables
Cmake Gui
BOOL to NSString
Objective C
Nsstring
Boolean
Better way to convert an int to a boolean
C#
Boolean
Int
Do the &= and |= operators for bool short-circuit?
C++
Boolean
Lazy Evaluation
Short Circuiting
Compound Assignment
Why is "!!" considered bad form in Perl?
Perl
Boolean
Type Conversion
Why is an if/else if/else for a simple boolean not giving an "unreachable code" error
Java
Boolean
Unreachable Code
Python AND operator on two boolean lists - how?
Python
List
Boolean
Operator Keyword
Why boolean in Java takes only true or false? Why not 1 or 0 also?
Java
Boolean
Checking date against date range in Python
Python
Datetime
Date
Time
Boolean
JSON values 1 or 0 - int or boolean
Json
Integer
Boolean
Why TRUE == "TRUE" is TRUE in R?
R
Boolean
Comparison
Boolean Logic
Converting "true" (JSON) to Python equivalent "True"
Python
Json
Dictionary
Boolean
Is std::is_unsigned<bool>::value well defined?
C++
Boolean
Language Lawyer
C++14
Unsigned
overriding bool() for custom class
Python
Class
Casting
Boolean
Python 2.x
'True' and 'False' in Python
Python
Boolean
How to fire jQuery function only if form is valid
Javascript
Jquery
Boolean
Unobtrusive Validation
How to write a `for` loop over bool values (false and true)
C++
For Loop
Boolean
Wait until boolean value changes it state
Java
Multithreading
Boolean
Why (null == false) and (null == true) both return false?
Javascript
Null
Boolean
Is !! a safe way to convert to bool in C++?
C++
Visual C++
Boolean
iPhone: Save boolean into Core Data
Iphone
Core Data
Boolean
Uiswitch
How to parse NSString into BOOL in Objective-C?
Objective C
Cocoa
Nsstring
Boolean
Java: Ternary with no return. (For method calling)
Java
Methods
Boolean
Return
Ternary
Comparing previous row values in Pandas DataFrame
Python
Pandas
Numpy
Boolean
Shift
What is the most 'pythonic' way to logically combine a list of booleans?
Python
List
Boolean
Is C/C++ bool type always guaranteed to be 0 or 1 when typecast'ed to int?
C++
C
Boolean
Initialize list with same bool value
Python
List
Initialization
Boolean
Rails validates_presense not validating on boolean?
Ruby on-Rails
Ruby on-Rails-4
Boolean
String literal matches bool overload instead of std::string
C++
String
Boolean
Overloading
Overload Resolution
WPF Radiobutton (two) (binding to boolean value)
Wpf
Binding
Radio Button
Boolean
Can't cast int to bool
C#
Casting
Int
Boolean
python tilde unary operator as negation numpy bool array
Python
Numpy
Boolean
Multidimensional Array
What is "!!" in C?
C
Gcc
Boolean
Boolean Expression
Select elements of numpy array via boolean mask array
Python
Numpy
Indexing
Boolean
Mask
Convert string to boolean in C#
C#
Boolean