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javascriptfirst-class-functions

Explain the term 'First-class functions' in relation to Javascript

Can someone explain this term for me and describe a typical programming situation where first-class functions are used? Thanks

Solution

  • We often hear that JavaScript functions are first-class functions, meaning both functions and objects are treated by the language as the same thing. In practical terms, a function can be stored as a variable, inside an array or an object, as well as it can be passed as an argument or be returned by another function. That makes functions “first-class citizens” in JavaScript.

    These are the examples:

    var myfunc2 = function(a)
{
 return a + 1;
};

var myfunc2 = function myfunc4(a)
{
 return a + 1;
};

    Refer the following links

    http://odiseo.net/javascript/first-class-functions-in-javascript-how-comes-functions-are-treated-as-objects-in-js

    http://www.developerfusion.com/article/84433/first-class-functions/