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About stdlib...

We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.

To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!

noneOwnBy

NPM version Build Status Coverage Status

Tests whether every own property of an object fails a test implemented by a predicate function.

Usage

To use in Observable,

noneOwnBy = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-none-own-by@umd/browser.js' )

To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:

var noneOwnBy = require( 'path/to/vendor/umd/utils-none-own-by/index.js' )

To include the bundle in a webpage,

<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/utils-none-own-by@umd/browser.js"></script>

If no recognized module system is present, access bundle contents via the global scope:

<script type="text/javascript">
(function () {
    window.noneOwnBy;
})();
</script>

noneOwnBy( object, predicate[, thisArg ] )

Tests whether every own property of an object fails a test implemented by a predicate function.

function isUnderage( age ) {
    return ( age < 18 );
}

var obj = {
    'a': 28,
    'b': 22,
    'c': 25
};

var bool = noneOwnBy( obj, isUnderage );
// returns true

If a predicate function returns a truthy value, the function immediately returns false.

function isUnderage( age ) {
    return ( age < 18 );
}

var obj = {
    'a': 12,
    'b': 22,
    'c': 25
};

var bool = noneOwnBy( obj, isUnderage );
// returns false

Notes

  • If the 1st argument is not an object or the second argument is not a fuction , the function throws a Type Error.

  • If provided an empty object, the function returns true.

    function truthy() {
    return true;
}
var bool = noneOwnBy( {}, truthy );
// returns true

Examples

<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/utils-none-own-by@umd/browser.js"></script>
<script type="text/javascript">
(function () {

function isUnderage( age ) {
    return age < 18;
}

var obj = {
    'a': 26,
    'b': 20,
    'c': 25
};

var bool = noneOwnBy( obj, isUnderage );
// returns true

})();
</script>
</body>
</html>

See Also

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

Chat

License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.