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@stdlib/boolean-ctor
Advanced tools
Readme
Boolean constructor.
npm install @stdlib/boolean-ctor
var Boolean = require( '@stdlib/boolean-ctor' );
Returns a Boolean
object, which is an object wrapper for a primitive boolean value.
var b = new Boolean( null );
// returns <Boolean>
When invoked without new
, the function converts an input value to a primitive boolean value.
var b = Boolean( null );
// returns false
Returns a string representation of the boolean value.
var b = new Boolean( true );
var str = b.toString();
// returns 'true'
Returns the primitive value of the boolean object.
var b = new Boolean( true );
var val = b.valueOf();
// returns true
b = new Boolean();
val = b.valueOf();
// returns false
When invoked without new
,
false
, null
, undefined
, -0
, 0
, NaN
, or an empty string, the function returns false
.'false'
, or a Boolean
object (including a Boolean
object whose value is false
), the function returns true
.When invoked with new
, the value of the returned Boolean
object adheres to the same conversion semantics as when the constructor is invoked without new
.
var format = require( '@stdlib/string-format' );
var Bool = require( '@stdlib/boolean-ctor' );
var values = [
'5',
5,
0,
NaN,
true,
false,
null,
void 0,
[],
{}
];
var i;
for ( i = 0; i < values.length; i++ ) {
console.log( format( '%s => %s', JSON.stringify( values[ i ] ), ( Bool( values[ i ] ) ) ? 'true' : 'false' ) );
}
This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
See LICENSE.
Copyright © 2016-2022. The Stdlib Authors.
FAQs
Boolean constructor.
The npm package @stdlib/boolean-ctor receives a total of 83,546 weekly downloads. As such, @stdlib/boolean-ctor popularity was classified as popular.
We found that @stdlib/boolean-ctor demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
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