stdlib-js
<summary>
About stdlib...
</summary>
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.
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hasOwnProperty
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Test if an object has a specified property.
bash
npm install @stdlib/assert-has-own-property
javascript
var hasOwnProp = require( '@stdlib/assert-has-own-property' );
#### hasOwnProp( value, property )
Returns a boolean indicating if a value has a specified property.
javascript
var value = {
'beep': 'boop'
};
var bool = hasOwnProp( value, 'beep' );
// returns true
bool = hasOwnProp( value, 'bap' );
// returns false
null or undefined. Instead, the function returns false.
javascript
var bool = hasOwnProp( null, 'a' );
// returns false
bool = hasOwnProp( void 0, 'a' );
// returns false
- Value arguments other than null or undefined are coerced to objects.
javascript
var bool = hasOwnProp( 'beep', 'length' );
// returns true
- Property arguments are coerced to strings.
javascript
var value = {
'null': false
};
var bool = hasOwnProp( value, null );
// returns true
value = {
'[object Object]': false
};
bool = hasOwnProp( value, {} );
// returns true
javascript
var hasOwnProp = require( '@stdlib/assert-has-own-property' );
var bool = hasOwnProp( { 'a': 'b' }, 'a' );
// returns true
bool = hasOwnProp( { 'a': 'b' }, 'c' );
// returns false
bool = hasOwnProp( { 'a': 'b' }, null );
// returns false
bool = hasOwnProp( {}, 'hasOwnProperty' );
// returns false
bool = hasOwnProp( null, 'a' );
// returns false
bool = hasOwnProp( void 0, 'a' );
// returns false
bool = hasOwnProp( { 'null': false }, null );
// returns true
bool = hasOwnProp( { '[object Object]': false }, {} );
// returns true
@stdlib/assert-has-property][@stdlib/assert/has-property]: test if an object has a specified property, either own or inherited.
