amos-tool/lib/_shallowCopy.js

amos ui tool

"use strict";

var utils = require("./utils");

function overArg(e, r) {
  return function(n) {
    return e(r(n));
  };
}

var nativeKeys = overArg(Object.keys, Object), hasOwnProperty = Object.prototype.hasOwnProperty;

function baseSlice(e, r, n) {
  var t = -1, o = e.length;
  r < 0 && (r = -r > o ? 0 : o + r), (n = n > o ? o : n) < 0 && (n += o), o = r > n ? 0 : n - r >>> 0, 
  r >>>= 0;
  for (var a = Array(o); ++t < o; ) a[t] = e[t + r];
  return a;
}

function copyArray(e) {
  return baseSlice(e, 0, e.length);
}

function baseAssignValue(e, r, n) {
  e[r] = n;
}

function assignValue(e, r, n) {
  var t = e[r];
  hasOwnProperty.call(e, r) && eq(t, n) && (void 0 !== n || r in e) || baseAssignValue(e, r, n);
}

function copyObject(e, r, n, t) {
  var o = !n;
  n || (n = {});
  for (var a = -1, c = r.length; ++a < c; ) {
    var i = r[a], s = t ? t(n[i], e[i], i, n, e) : void 0;
    void 0 === s && (s = e[i]), o ? baseAssignValue(n, i, s) : assignValue(n, i, s);
  }
  return n;
}

function eq(e, r) {
  return e === r || e != e && r != r;
}

function clone(e) {
  return utils.isObject(e) ? utils.isArray(e) ? copyArray(e) : copyObject(e, nativeKeys(e)) : e;
}

module.exports = {
  clone: clone,
  copyArray: copyArray,
  copyObject: copyObject,
  eq: eq
};