index.js
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'use strict'
module.exports = rfdc
function rfdc (opts) {
opts = opts || {}
const proto = opts.proto || false
const circles = opts.circles || false
if (circles) return rfdcCircles(opts)
return proto ? cloneProto : clone
function clone (o) {
const type = typeof o
if (type === 'function') return o
if (o === null || type !== 'object') return o
if (o instanceof Date) return new Date(o)
const o2 = Array.isArray(o) ? new Array(o.length) : {}
for (var k in o) {
if (Object.hasOwnProperty.call(o, k) === false) continue
var cur = o[k]
if (typeof cur === 'function') {
o2[k] = cur
continue
}
if (cur === null) {
o2[k] = null
continue
}
if (typeof cur === 'object') {
if (cur instanceof Date) {
o2[k] = new Date(cur)
continue
}
o2[k] = clone(cur)
continue
}
o2[k] = cur
}
return o2
}
function cloneProto (o) {
const type = typeof o
if (type === 'function') return o
if (o === null || type !== 'object') return o
if (o instanceof Date) return new Date(o)
const o2 = Array.isArray(o) ? new Array(o.length) : {}
for (var k in o) {
var cur = o[k]
if (typeof cur === 'function') {
o2[k] = cur
continue
}
if (cur === null) {
o2[k] = null
continue
}
if (typeof cur === 'object') {
if (cur instanceof Date) {
o2[k] = new Date(cur)
continue
}
o2[k] = cloneProto(cur)
continue
}
o2[k] = cur
}
return o2
}
}
function rfdcCircles (opts) {
const proto = opts.proto || false
const refs = new WeakMap()
return proto ? cloneProto : clone
function clone (o) {
const type = typeof o
if (type === 'function') return o
if (o === null || type !== 'object') return o
if (o instanceof Date) return new Date(o)
const o2 = Array.isArray(o) ? new Array(o.length) : {}
refs.set(o, o2)
for (var k in o) {
if (Object.hasOwnProperty.call(o, k) === false) continue
var cur = o[k]
if (typeof cur === 'function') {
o2[k] = cur
continue
}
if (cur === null) {
o2[k] = null
continue
}
if (typeof cur === 'object') {
if (cur instanceof Date) {
o2[k] = new Date(cur)
continue
}
if (refs.has(cur)) o2[k] = refs.get(cur)
else o2[k] = clone(cur)
continue
}
o2[k] = cur
}
refs.delete(o)
return o2
}
function cloneProto (o) {
const type = typeof o
if (type === 'function') return o
if (o === null || type !== 'object') return o
if (o instanceof Date) return new Date(o)
const o2 = Array.isArray(o) ? new Array(o.length) : {}
refs.set(o, o2)
for (var k in o) {
var cur = o[k]
if (typeof cur === 'function') {
o2[k] = cur
continue
}
if (cur === null) {
o2[k] = null
continue
}
if (typeof cur === 'object') {
if (cur instanceof Date) {
o2[k] = new Date(cur)
continue
}
if (refs.has(cur)) o2[k] = refs.get(cur)
else o2[k] = cloneProto(cur)
continue
}
o2[k] = cur
}
refs.delete(o)
return o2
}
}