buffer: add .from(), .alloc() and .allocUnsafe()

Several changes:

* Soft-Deprecate Buffer() constructors
* Add `Buffer.from()`, `Buffer.alloc()`, and `Buffer.allocUnsafe()`
* Add `--zero-fill-buffers` command line option
* Add byteOffset and length to `new Buffer(arrayBuffer)` constructor
* buffer.fill('') previously had no effect, now zero-fills
* Update the docs

PR-URL: https://github.com/nodejs/node/pull/4682
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/test/parallel/test-http-write-callbacks.js b/test/parallel/test-http-write-callbacks.js
index 404396723e..6f36bcdd8f 100644
--- a/test/parallel/test-http-write-callbacks.js
+++ b/test/parallel/test-http-write-callbacks.js
@@ -36,7 +36,7 @@ server.on('checkContinue', function(req, res) {
         assert.ifError(er);
         res.write('foo', 'ascii', function(er) {
           assert.ifError(er);
-          res.end(new Buffer('bar'), 'buffer', function(er) {
+          res.end(Buffer.from('bar'), 'buffer', function(er) {
             serverEndCb = true;
           });
         });
@@ -60,7 +60,7 @@ server.listen(common.PORT, function() {
     // ok, good to go.
     req.write('YmF6', 'base64', function(er) {
       assert.ifError(er);
-      req.write(new Buffer('quux'), function(er) {
+      req.write(Buffer.from('quux'), function(er) {
         assert.ifError(er);
         req.end('626c657267', 'hex', function(er) {
           assert.ifError(er);