Adrien Friggeri has been playing with pattern matching in JavaScript a la functional programming.
Take a look at the examples such as writing a factorial via matching:
PLAIN TEXT
JAVASCRIPT:
function fact (n) {
return m.match(n,
[
[ 0 , function ( ) { return 1 }],
[ _("n"), function (a) { return (a.n * fact(a.n -1)) }]
]);
}
or working with complex structures:
PLAIN TEXT
JAVASCRIPT:
function go_deep(ob) {
return m.match(ob,
[
[{foo:{bar:{baz:foo}}, baz:_()}, function (a) { return a.b }],
[_(\_) , function ( ) { return null }]
]);
}
source: ajaxian
Original Source:
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