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Lazy Clone using Proxy
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Just created! Very limitted usage. | |
TODO: | |
- `enumerate` | |
- `ownKeys` | |
- `has` |
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function isObject(obj) { | |
var type = typeof obj; | |
return type === 'object' && !!obj; | |
} | |
function lazyClone(source) { | |
function seltBelt(source) { | |
var clone = {}; | |
return new Proxy(source, { | |
get: function (target, prop) { | |
if (prop === '__isProxy') return true; | |
if (clone[prop]) return clone[prop]; | |
var accessedProperty = target[prop]; | |
if (isObject(accessedProperty) && !accessedProperty.__isProxy) { | |
return seltBelt(accessedProperty); | |
} else { | |
return accessedProperty | |
} | |
}, | |
set: function (target, prop, value) { | |
return clone[prop] = value; | |
}, | |
}); | |
} | |
return seltBelt(source); | |
} | |
// Usage | |
var FOC = {f:1,o:1,c:1}; | |
var abitComplexObject = [{x: [1,2],y: FOC}, false, [1,2, {n: 1}]] | |
var CLONE = lazyClone(abitComplexObject); | |
CLONE[0].y.f = 20 | |
console.log(FOC.f !== CLONE[0].y.f) // true |
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