trycatch

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

Installation

npm install @stdlib/utils-try-catch

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 );
}

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.

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.