Lodash - forIn method


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Syntax

_.forIn(object, [iteratee=_.identity])

Iterates over own and inherited enumerable string keyed properties of an object and invokes iteratee for each property. The iteratee is invoked with three arguments: (value, key, object). Iteratee functions may exit iteration early by explicitly returning false.

Arguments

  • object (Object) − The object to iterate over.

  • [iteratee=_.identity] (Function) − The function invoked per iteration.

Output

  • (object) − Returns object.

Example

var _ = require('lodash');
 
function Foo() {
   this.a = 1;
   this.b = 2;
}
Foo.prototype.c = 3;
 
_.forIn(new Foo, function(value, key) {
   console.log(key);
});

Save the above program in tester.js. Run the following command to execute this program.

Command

\>node tester.js

Output

1
2
3
lodash_object.htm
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