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ʵÏÖÐèÇóFunction Overload(defaultCall) { let func = defaultCall || new Function() func.overloadCached = [] return new Proxy(func, { set(target, prop, value) { if(prop === 'load') { target.overloadCached.push(value) } }, apply(target, thisArg, argumentsList) { for(let i = target.OverloadCached.length - 1; i > -1; i--) { if(argumentsList.length === target.overloadCached[i].length || (argumentsList.length > target.overloadCached[i].length)) { return target.overloadCached[i].apply(thisArg, argumentsList) } } return target.apply(thisArg, argumentsList) } })}let sum = Overload()sum.load = function (a) { return a * 0.95;}sum.load = function (a, b) { return (a b) * 0.9;}sum.load = function (a, b, c) { return (a b c) * 0.85;}sum.load = function (a, b, c, d, ...arg) { return (arg.concat(a,b,c,d).reduce((total, cur) => {return total cur},0)) * 0.8;}console.log(sum(200));console.log(sum(200, 300));console.log(sum(180, 280, 190));console.log(sum(270, 260, 310, 240));console.log(sum(180, 220, 240, 210, 190));//Êä³ö£º190,450,552.5,864,832¿ÉÒÔ¿´µ½£¬ÎÒÃÇʵÏÖÁËÒ»¸öOverloadº¯Êý£¬ÓÃÀ´·µ»ØÒ»¸öProxy£¬Í¨¹ýËüÈ¥load²»Í¬µÄ·½·¨À´ÊµÏÖ¶ÔͬÃû·½·¨µÄÖØÔØ£¬µ÷ÓõÄʱºòÖ»ÐèÒªÒ»¸ö·½·¨Ãû¼´¿É£¬ProxyÖÐÎÒÃǶÔset(¼´ÉèÖøÃProxyµÄÖµµÄ²Ù×÷)ºÍapply(¼´Ö´ÐиÃProxyµÄ²Ù×÷)Á½ÖÖ²Ù×÷½øÐÐÁËÀ¹½Ø£¬Óõ½ÁËÒ»¸ö½Ð×öoverloadCachedµÄÊôÐÔÀ´»º´æÎÒÃǵĴ¦Àíº¯Êý£¬ÔÚµ÷Óú¯ÊýµÄʱºò£¬ÎÒÃÇʹÓôӺóÍùÇ°±éÀúµÄ·½Ê½£¬À´´ïµ½ºó¶¨ÒåÓÅÏÈÉúЧµÄÔÔò¡£
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function Overload(defaultCall) { let func = defaultCall || new Function() func.overloadCached = [] return new Proxy(func, { set(target, prop, value) { if(prop === 'load') { target.overloadCached.push(value) } }, apply(target, thisArg, argumentsList) { for(let i = target.overloadCached.length - 1; i > -1; i--) { //×¢ÒâÕâÀïµÄ±ä»¯ if(argumentsList.length === target.overloadCached[i].length) { return target.overloadCached[i].apply(thisArg, argumentsList) } } return target.apply(thisArg, argumentsList) } })}let sum = Overload(function () { return ([].__proto__.reduce.call(arguments, (total, cur) => {return total cur},0)) * 0.8;})sum.load = function (a) { return a * 0.95;}sum.load = function (a, b) { return (a b) * 0.9;}sum.load = function (a, b, c) { return (a b c) * 0.85;}console.log(sum(200));console.log(sum(200, 300));console.log(sum(180, 280, 190));console.log(sum(270, 260, 310, 240));console.log(sum(180, 220, 240, 210, 190));//Êä³ö£º190,450,552.5,864,832ÎÒÃÇ×¢ÒâOverloadº¯ÊýµÄ±ä»¯£¬ÏÖÔÚÒÀÈ»Âú×ãÉÏÃæµÄÐèÇó¡£
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function Overload(defaultCall) { let func = defaultCall || new Function() func.overloadCached = [] return new Proxy(func, { set(target, prop, value) { if(prop === 'load') { let str = value.toString() let m1 = str.match(/(. ?)/) if(m1 && m1[0].indexOf("...") != -1) { value.rest = true } target.overloadCached.push(value) } }, apply(target, thisArg, argumentsList) { for(let i = target.overloadCached.length - 1; i > -1; i--) { if((argumentsList.length === target.overloadCached[i].length) || (target.overloadCached[i].rest && argumentsList.length > target.overloadCached[i].length)) { return target.overloadCached[i].apply(thisArg, argumentsList) } } return target.apply(thisArg, argumentsList) } })}//Êä³ö£º190,450,552.5,864,832ÏÖÔÚʹÓÃÕâ¸öOverloadº¯Êý¾ÍÒѾÄܹ»´¦ÀíÉÏÃæµÄÕâÁ½ÖÖÇé¿öÁË¡£ÎÒÃÇÉ趨ÁËÒ»¸örestÊôÐÔÀ´¸ø·½·¨´òÉÏÁËÒ»¸ö±êʶ¡£
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//ÎÒÃÇÔ¼¶¨ÁË10ÖÖÀàÐÍ//n¡únumber//s¡ústring//b¡úBoolean//o¡úobject//a¡úarray//d¡údate//S¡úSymbol//r¡úregexp//B¡úbigint//f¡úfunctionfunction Overload(defaultCall) { let func = defaultCall || new Function() func.overloadCached = [] func.modifier = [] return new Proxy(func, { get(target, property, receiver) { if(property !== 'load') { target.modifier.push(property) } return receiver }, set(target, prop, value) { if(['n','s','b','o','a','d','S','r','B','f'].includes(prop)) { target.modifier.push(prop) } if(prop === 'load' || target.modifier.length !== 0) { let str = value.toString() let m1 = str.match(/(. ?)/) if(m1 && m1[0].indexOf("...") != -1) { value.rest = true } value.modifier = target.modifier target.overloadCached.push(value) target.modifier = [] } }, apply(target, thisArg, argumentsList) { for(let i = target.overloadCached.length - 1; i > -1; i--) { if((argumentsList.length === target.overloadCached[i].length) || (target.overloadCached[i].rest && argumentsList.length > target.overloadCached[i].length)) { if(target.overloadCached[i].modifier.length !== 0){ let ty = { '[object Number]': ['n'], '[object String]': ['s'], '[object Boolean]': ['b'], '[object Object]': ['o'], '[object Array]': ['a'], '[object Date]': ['d'], '[object Symbol]': ['S'], '[object Regexp]': ['r'], '[object BigInt]': ['B'], '[object Function]': ['f'], } if(target.overloadCached[i].modifier.some((m, j) => { return !ty[({}).__proto__.toString.call(argumentsList[j])].includes(m) })) { continue } } return target.overloadCached[i].apply(thisArg, argumentsList) } } return target.apply(thisArg, argumentsList) } })}let sum = Overload()sum.load.n = function (a) { return a * 0.95;}sum.load.n.n = function (a, b) { return (a b) * 0.9;}sum.load.n.n.n = function (a, b, c) { return (a b c) * 0.85;}sum.load.s.n.n = function (a, b, c) { return a (b c) * 0.85;}sum.load.n.n.n.n = function (a, b, c, d, ...arg) { return (arg.concat(a,b,c,d).reduce((total, cur) => {return total cur},0)) * 0.8;}sum.load.s.n.n.n = function (a, b, c, d, ...arg) { return a (arg.concat(b,c,d).reduce((total, cur) => {return total cur},0)) * 0.8;}console.log(sum(200));console.log(sum(200, 300));console.log(sum(260, 310, 240));console.log(sum('€', 280, 190));console.log(sum(180, 220, 240, 210, 190));console.log(sum('$', 220, 240, 210, 190));//Êä³ö£º190,450,688.5,€399.5,832,$688ÎÒÃÇÏÖÔÚÒѾ¼ÓÉÏÁËÀàÐÍÅжϣ¬Í¨¹ý´«ÈëµÄ²ÎÊýÀàÐÍÓë¸öÊýµÄ²»Í¬£¬Äܹ»ÏàÓ¦µÄÈ¥Ö´ÐжÔÓ¦µÄº¯Êý£¬Æäʵ²ÎÊýµÄ˳ÐòÒ»¸öµÀÀí£¬Ò²ÊÇÖ§³ÖµÄ¡£
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function Overload(defaultCall) { let func = defaultCall || new Function() func.overloadCached = [] func.modifier = [] return new Proxy(func, { get(target, property, receiver) { if(property !== 'load') { if(property.indexOf(',') !== -1) { property.split(',').map(item => { target.modifier.push(item) }) }else{ property.split('').map(item => { target.modifier.push(item) }) } } return receiver }, set(target, prop, value) { let modi = null if(prop.indexOf(',') !== -1) { modi = prop.split(',') }else{ modi = prop.split('') } if(modi.every(p => { return ['n','s','b','o','a','d','S','r','B','f','number','string','boolean','object','array','date','Symbol','regexp','bigint','function'].includes(p) })) { modi.map(item => { target.modifier.push(item) }) } if(prop === 'load' || target.modifier.length !== 0) { let str = value.toString() let m1 = str.match(/(. ?)/) if(m1 && m1[0].indexOf("...") != -1) { value.rest = true } value.modifier = target.modifier target.overloadCached.push(value) target.modifier = [] } }, apply(target, thisArg, argumentsList) { for(let i = target.overloadCached.length - 1; i > -1; i--) { if((argumentsList.length === target.overloadCached[i].length) || (target.overloadCached[i].rest && argumentsList.length > target.overloadCached[i].length)) { if(target.overloadCached[i].modifier.length !== 0){ let ty = { '[object Number]': ['n','number'], '[object String]': ['s','string'], '[object Boolean]': ['b','boolean'], '[object Object]': ['o','object'], '[object Array]': ['a','array'], '[object Date]': ['d','date'], '[object Symbol]': ['S','Symbol'], '[object Regexp]': ['r','regexp'], '[object BigInt]': ['B','bigint'], '[object Function]': ['f','function'], } if(target.overloadCached[i].modifier.some((m, j) => { return !ty[({}).__proto__.toString.call(argumentsList[j])].includes(m) })) { continue } } return target.overloadCached[i].apply(thisArg, argumentsList) } } return target.apply(thisArg, argumentsList) } })}ÕâÑùÎÒÃǾͿÉÒÔÖ§³Öһϼ¸ÖÖÀàÐÍÔ¼¶¨µÄÊéдÐÎʽ£º
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