ifthen

    If a condition is truthy, invoke x; otherwise, invoke y.

    Usage

    var ifthen = require( '@stdlib/utils/if-then' );
    

    ifthen( bool, x, y )

    If a condition is truthy, invokes x; otherwise, invokes y.

    function x() {
        return 1.0;
    }
    
    function y() {
        return -1.0;
    }
    
    var z = ifthen( true, x, y );
    // returns 1.0
    
    z = ifthen( false, x, y );
    // returns -1.0
    

    Notes

    • The function is similar to ifelse(), but allows deferred argument evaluation.

    Examples

    var randu = require( '@stdlib/random/base/randu' );
    var ceil = require( '@stdlib/math/base/special/ceil' );
    var repeatString = require( '@stdlib/string/repeat' );
    var ifthen = require( '@stdlib/utils/if-then' );
    
    var z;
    var i;
    
    function x() {
        return repeatString( 'BOOP', ceil( randu()*3.0 ) );
    }
    
    function y() {
        return repeatString( 'beep', ceil( randu()*5.0 ) );
    }
    
    for ( i = 0; i < 100; i++ ) {
        z = ifthen( randu() > 0.9, x, y );
        console.log( z );
    }