Using typeof to check for function
1638
var functionName = function() {} vs function functionName() {}
104459
How do I check if an object's type is a particular subclass in C++?
39332
Are "(function ( ) { } ) ( )" and "(function ( ) { } ( ) )" functionally equal in JavaScript?
37735
How can I check for "undefined" in JavaScript?
125644
How to check f is surjective
73021
Javascript : is given function empty?
70306
Lambda including if...elif...else
1727
How to determine function name from inside a function
64107
Finding the type of an object in C++
103811
Can I determine if an argument is string literal?
35582
instanceof check in EL expression language
88022
How to convert an "object" into a function in JavaScript?
113905
How can I check whether a variable is defined in JavaScript?
157088
What is return type of `if` statement
30987
How to tell if a JavaScript function is defined
42171
How to get the function name from within that function?
76474
How to make a function that evaluates an expression?