Created
December 10, 2013 22:45
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| <!-- | |
| Use the following or similar to execute JS | |
| --> | |
| <html> | |
| <body> | |
| <pre> | |
| <script> | |
| function log(arg) { | |
| document.writeln(arg); | |
| } | |
| function identity(x) { | |
| return x; | |
| } | |
| var add = function(x, y) { | |
| return x + y; | |
| } | |
| var mul = function(x, y) { | |
| return x * y; | |
| } | |
| // write a function which returns a function which returns the original functions arg | |
| var identityf = function(n) { | |
| return function() { | |
| return n; | |
| } | |
| } | |
| // write a function that executes an operator on following invocations over three invocations | |
| // applyf(add)(3)(4) | |
| var applyf = function(operator) { | |
| return function(x) { | |
| return function(y) { | |
| return operator(x,y); | |
| } | |
| } | |
| } | |
| // write a function that adds from two invocations | |
| var addf = function(x) { | |
| return applyf(add)(x); | |
| } | |
| // write a function that takes a function and an arg, and returns a function that can take a second arg | |
| var curry = function(binary, fixedArg) { | |
| return function(arg) { | |
| return binary(fixedArg, arg); | |
| } | |
| } | |
| log(identity(3)); | |
| </script> | |
| </pre> | |
| </body> | |
| </html> |
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