Function extend

lib/utils/helpers.js:13–45

(base, source)

}

function extend(base, source) {
  var isArray = Array.isArray(source);

  if (base == null) {
    base = isArray ? [] : {};
  }

  if (isArray) {
    source.forEach(function(e, i) {
      if (typeof base[i] === "undefined") {
        base[i] = e;
      } else if (typeof e === "object") {
        base[i] = extend(base[i], e);
      } else if (!~base.indexOf(e)) {
        base.push(e);
      }
    });
  } else {
    var key;

    for (key in source) {
      if (typeof source[key] !== "object" || !source[key]) {
        base[key] = source[key];
      } else if (base[key]) {
        extend(base[key], source[key]);
      } else {
        base[key] = source[key];
      }
    }
  }

  return base;
}

extend(H, {
  identity: identity,