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mostly-adequate-guide
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| // https://github.com/MostlyAdequate/mostly-adequate-guide | |
| // https://llh911001.gitbooks.io/mostly-adequate-guide-chinese/content/ch5.html | |
| // this is my practice while reading the book | |
| var compose = function(){ | |
| var args = arguments; | |
| return function(x){ | |
| var res = x; | |
| for(var i=args.length-1; i>=0; i--){ | |
| res = args[i](res); | |
| } | |
| return res; | |
| }; | |
| }; | |
| var toUpperCase = function(str){ | |
| return str.toUpperCase(); | |
| }; | |
| var getMatchFn = function(RegExp){ // it's a curry func! | |
| return function(str){ | |
| var res = str.match(RegExp); | |
| return res && res[0] || 'not matched'; | |
| }; | |
| }; | |
| var findHello = function(s){ | |
| return getMatchFn(/hello/)(s); | |
| }; | |
| var strengthHello = compose(toUpperCase, findHello); | |
| console.log( strengthHello('yo hello world') ); |
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