arr.filter((item, index, arr) => arr.indexOf(item, 0) === index )
image.png
深拷贝
function deepClone(origin, target) {
var target = target || {},
toStr = Object.prototype.toString,
tpyeArray = '[object Array]';
for (key in origin) {
if (origin.hasOwnProperty(key)) {
if (typeof(origin[key]) === 'object' && origin[key] !== null) {
toStr.call(origin[key]) === tpyeArray ? target[key] = [] : target[key] = {}
} else {
target[key] = origin[key]
}
}
}
return target
}
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