Return a partial object copy excluding properties for which a predicate (function) returns a truthy value.
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> Return a partial object copy excluding properties for which a predicate (function) returns a truthy value.
``bash`
npm install @stdlib/utils-omit-by
`javascript`
var omitBy = require( '@stdlib/utils-omit-by' );
#### omitBy( obj, predicate )
Returns a partial object copy excluding properties for which a predicate returns a truthy value.
`javascript
function predicate( key, value ) {
return ( value > 1 );
}
var obj1 = {
'a': 1,
'b': 2,
'c': 3
};
var obj2 = omitBy( obj1, predicate );
// returns { 'a': 1 }
`
- The function returns a shallow copy.
- The function only copies own properties. Hence, the function never copies inherited properties.
`javascript
var omitBy = require( '@stdlib/utils-omit-by' );
function predicate( key, value ) {
return ( typeof value === 'number' );
}
var obj1 = {
'a': '1',
'b': 2,
'c': NaN,
'd': null
};
var obj2 = omitBy( obj1, predicate );
// returns { 'a': '1', 'd': null }
`
*
- [@stdlib/utils-omit][@stdlib/utils/omit]: return a partial object copy excluding specified keys.
*
This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib].
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---
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Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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