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Delicious currying
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//Module with boilerplate/duplicated code | |
var Module = function (elements) { | |
var | |
onLink1Click = function (callback) { | |
elements.link1.on("click", function (e) { | |
callback(); | |
e.preventDefault(); | |
}); | |
}, | |
onLink2Click = function (callback) { | |
elements.link2.on("click", function (e) { | |
callback(); | |
e.preventDefault(); | |
}); | |
}; | |
return { | |
onLink1Click: onLink1Click, | |
onLink2Click: onLink2Click | |
}; | |
}; | |
//Extracted duplicity | |
var Module = function (elements) { | |
var | |
onClick = function (elem, callback) { | |
elem.on("click", function (e) { | |
callback(); | |
e.preventDefault(); | |
}); | |
}, | |
onLink1Click = function (callback) { | |
onClick(elements.link1, callback); | |
}, | |
onLink2Click = function (callback) { | |
onClick(elements.link2, callback); | |
}; | |
return { | |
onLink1Click: onLink1Click, | |
onLink2Click: onLink2Click | |
}; | |
}; | |
//Curry, even better! | |
var Module = function (elements) { | |
var | |
onClick = function (elem) { | |
return function (callback) { | |
elem.on("click", function (e) { | |
callback(); | |
e.preventDefault(); | |
}); | |
}; | |
}, | |
onLink1Click = onClick(elements.link1), | |
onLink2Click = onClick(elements.link2); | |
return { | |
onLink1Click: onLink1Click, | |
onLink2Click: onLink2Click | |
}; | |
}; | |
//Usage | |
var module = Module({ | |
link1: $('#link1'), | |
link2: $('#link2') | |
}); | |
module.onLink1Click(function () { | |
console.log('click1'); | |
}); | |
module.onLink2Click(function () { | |
console.log('click2'); | |
}); |
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