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浅聊偏函数
2022-08-04 09:06:00 【InfoQ】
function ajax(url, data, callback) {
// ..
}
function ajaxTest1(data, callback) {
ajax('http://www.test.com/test1', data, callback);
}
ajaxTest1ajaxajaxTest1ajaxTest2、ajaxTest3、……、ajaxTestNfunction ajaxTest2(data, callback) {
ajax('http://www.test.com/test2', data, callback);
}
function ajaxTest3(data, callback) {
ajax('http://www.test.com/test3', data, callback);
}
......
function ajaxTestN(data, callback) {
ajax('http://www.test.com/testN', data, callback);
}
let ajaxTest2 = partial(ajax,'http://www.test.com/test2')
partialajaxajaxTest2ajaxajaxTest2(data,callback)
partialpartialfunction partial(fn, ...presetArgs) { // presetArgs 是需要先被绑定下来的参数
return function partiallyApplied(...laterArgs) { // ...laterArgs 是后续参数
let allArgs =presetArgs.concat(laterArgs) // 收集到一起
return fn.apply(this, allArgs) // 传给回调函数 fn
}
}
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