trycatch

If a function does not throw, return the function return value; otherwise, return y.

Usage

var trycatch = require( '@stdlib/utils/try-catch' );

trycatch( x, y )

If a function x does not throw, returns the return value of x; otherwise, returns y.

function x1() {
    return 1.0;
}

var z = trycatch( x1, -1.0 );
// returns 1.0

function x2() {
    throw new Error( 'beep' );
}

z = trycatch( x2, -1.0 );
// returns -1.0

Examples

var randu = require( '@stdlib/random/base/randu' );
var trycatch = require( '@stdlib/utils/try-catch' );

var z;
var i;

function x() {
    if ( randu() < 0.9 ) {
        throw new Error( 'BOOP' );
    }
    return 'BOOP';
}

for ( i = 0; i < 100; i++ ) {
    z = trycatch( x, 'beep' );
    console.log( z );
}

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See Also

• @stdlib/utils/async/try-catch: if a function does not return an error, invoke a callback with the function result; otherwise, invoke a callback with a value y.
• @stdlib/utils/try-then: if a function does not throw, return the function return value; otherwise, return the return value of a second function.