more work

node_modules/lodash/internal/bufferClone.js

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+var constant = require('../utility/constant'),
+    isNative = require('../lang/isNative');
+
+/** Native method references. */
+var ArrayBuffer = isNative(ArrayBuffer = global.ArrayBuffer) && ArrayBuffer,
+    bufferSlice = isNative(bufferSlice = ArrayBuffer && new ArrayBuffer(0).slice) && bufferSlice,
+    floor = Math.floor,
+    Uint8Array = isNative(Uint8Array = global.Uint8Array) && Uint8Array;
+
+/** Used to clone array buffers. */
+var Float64Array = (function() {
+  // Safari 5 errors when using an array buffer to initialize a typed array
+  // where the array buffer's `byteLength` is not a multiple of the typed
+  // array's `BYTES_PER_ELEMENT`.
+  try {
+    var func = isNative(func = global.Float64Array) && func,
+        result = new func(new ArrayBuffer(10), 0, 1) && func;
+  } catch(e) {}
+  return result;
+}());
+
+/** Used as the size, in bytes, of each `Float64Array` element. */
+var FLOAT64_BYTES_PER_ELEMENT = Float64Array ? Float64Array.BYTES_PER_ELEMENT : 0;
+
+/**
+ * Creates a clone of the given array buffer.
+ *
+ * @private
+ * @param {ArrayBuffer} buffer The array buffer to clone.
+ * @returns {ArrayBuffer} Returns the cloned array buffer.
+ */
+function bufferClone(buffer) {
+  return bufferSlice.call(buffer, 0);
+}
+if (!bufferSlice) {
+  // PhantomJS has `ArrayBuffer` and `Uint8Array` but not `Float64Array`.
+  bufferClone = !(ArrayBuffer && Uint8Array) ? constant(null) : function(buffer) {
+    var byteLength = buffer.byteLength,
+        floatLength = Float64Array ? floor(byteLength / FLOAT64_BYTES_PER_ELEMENT) : 0,
+        offset = floatLength * FLOAT64_BYTES_PER_ELEMENT,
+        result = new ArrayBuffer(byteLength);
+
+    if (floatLength) {
+      var view = new Float64Array(result, 0, floatLength);
+      view.set(new Float64Array(buffer, 0, floatLength));
+    }
+    if (byteLength != offset) {
+      view = new Uint8Array(result, offset);
+      view.set(new Uint8Array(buffer, offset));
+    }
+    return result;
+  };
+}
+
+module.exports = bufferClone;