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@@ -163,6 +163,54 @@ function countUp(n) {
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countUp(1);
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```
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## Anonymous Functions
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Anonymous function is the function that was declared without any named identifier to refer to it.
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For example:
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```javascript
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// Normal function
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functionsayHi() {
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alert('Hello world!');
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}
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sayHi();
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// Anonymous function assigned to sayHi variable
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varsayHi=function() {
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alert('Hello World!');
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}
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// Use as an argument to other functions
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setTimeout(function() {
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console.log('Hello World!');
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}, 1000);
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// Use as a closure
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(function() {
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alert('Hello World!');
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})();
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// Use as a closure with parameters
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(function(msg) {
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alert(msg);
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}('Hello World!'));
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// An anonymous function can refer to itself via arguments.callee local variable, useful for recursive anonymous functions
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console.log(
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(function(n) {
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return (1< n) ?arguments.callee(n -1) + n :1;
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})(10)
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);
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// Instead of using arguments.callee, you can use named function expression instead
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console.log(
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(functionsum(n) {
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return (n <=1) ?1:sum(n-1) + n
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})(10)
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);
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```
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## Currying
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Currying allows a function with multiple arguments to be translated into a sequence of functions. Curried functions can be tailored to match the signature of another function.
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