iterEvery

Test whether all iterated values are truthy.

Installation

npm install @stdlib/iter-every

Usage

var iterEvery = require( '@stdlib/iter-every' );

iterEvery( iterator )

Tests whether all iterated values are truthy.

var array2iterator = require( '@stdlib/array-to-iterator' );

var arr = array2iterator( [ 1, 1, 1, 1, 0 ] );

var bool = iterEvery( arr );
// returns false

If a provided iterator does not return any iterated values, the function returns true.

var array2iterator = require( '@stdlib/array-to-iterator' );

var bool = iterEvery( array2iterator( [] ) );
// returns true

Examples

var randu = require( '@stdlib/random-iter-randu' );
var iterMap = require( '@stdlib/iter-map' );
var iterEvery = require( '@stdlib/iter-every' );

function threshold( r ) {
    return ( r <= 0.95 );
}

// Create an iterator which generates uniformly distributed pseudorandom numbers:
var opts = {
    'iter': 100
};
var riter = randu( opts );

// Create an iterator which applies a threshold to generated numbers:
var miter = iterMap( riter, threshold );

// Determine if all values are "truthy":
var bool = iterEvery( miter );
// returns <boolean>

console.log( bool );

See Also

• @stdlib/iter-any: test whether at least one iterated value is truthy.
• @stdlib/iter-every-by: test whether every iterated value passes a test implemented by a predicate function.
• @stdlib/iter-for-each: create an iterator which invokes a function for each iterated value before returning the iterated value.
• @stdlib/iter-none: test whether all iterated values are falsy.
• @stdlib/iter-some: test whether at least n iterated values are truthy.

Notice

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.

Community

License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.