Javascript Map New Object

How can i know which radio button is selected via jquery? So that the topmost x elements would be the x. The javascript map method is used to call a function on each element of an array to create a different array based on the outputs of the function.

Here, we have used numbers as keys and strings to represent that number as value. @amberlamps your.reduce example is ok, but imho it still falls a long way short of the convenience of a.map for objects, since your.reduce callback not only has to match the way that.reduce works, but also requires that myobject be available in the lexical scope. Every number can be represented as a word by using the number as key and word as value.

How to extend an existing javascript array with another array, without creating a new array.

What i wanted to do is, for each new value for each key, getting the object to the top of the array. However, of all the advantages of map over object, map cannot replace object in javascript because object is much more than a hash table. Ask wizard test results and next. Get() gets the value for a key in a map: