has-in

v0.9.6

STATUS

Passing

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VISIBILITY

Public

PUBLISHED

5 years ago

SIZE

798 B

Returns whether or not an object or its prototype chain has a property with the specified name

Object

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hasIn (

prop:String,

obj:Object

) : Boolean

Returns whether or not an object or its prototype chain has a property with the specified name

Example

function Rectangle(width, height) {
       this.width = width;
       this.height = height;
     }
     Rectangle.prototype.area = function() {
       return this.width * this.height;
     };

     const square = new Rectangle(2, 2);
     R.hasIn('width', square);  //=> true
     R.hasIn('area', square);  //=> true

Arguments

prop: String

The name of the property to check for.

obj: Object

The object to query.

Returns

Boolean

Whether the property exists.