Add Splat Arguments To A Function as a javascript til.

javascript/splat-arguments-to-a-function.md

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+# Splat Arguments To A Function
+
+Often times you have a function that takes a certain set of arguments. Like
+the following `adder` function:
+
+```javascript
+var adder = function(a,b,c) {
+  return a + b + c;
+};
+```
+
+But you are left trying to pass in arguments as an array (e.g. `[1,2,3]`).
+You want to be able to *splat* the array of arguments so that it matches the
+function declaration. This can be done by using `apply`.
+
+```javascript
+> adder.apply(undefined, [1,2,3])
+6
+```