iterEvery

Test whether all iterated values are truthy.

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 );

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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.