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, 3 insertions, 3 deletions

diff --git a/test/parallel/test-http-parser-bad-ref.js b/test/parallel/test-http-parser-bad-ref.js
index 545a9c1fef..b7f132a3ea 100644
--- a/test/parallel/test-http-parser-bad-ref.js
+++ b/test/parallel/test-http-parser-bad-ref.js
@@ -17,7 +17,7 @@ var headersComplete = 0;
 var messagesComplete = 0;
 
 function flushPool() {
-  new Buffer(Buffer.poolSize - 1);
+  Buffer.allocUnsafe(Buffer.poolSize - 1);
   gc();
 }
 
@@ -49,7 +49,7 @@ function demoBug(part1, part2) {
   // We use a function to eliminate references to the Buffer b
   // We want b to be GCed. The parser will hold a bad reference to it.
   (function() {
-    var b = Buffer(part1);
+    var b = Buffer.from(part1);
     flushPool();
 
     console.log('parse the first part of the message');
@@ -59,7 +59,7 @@ function demoBug(part1, part2) {
   flushPool();
 
   (function() {
-    var b = Buffer(part2);
+    var b = Buffer.from(part2);
 
     console.log('parse the second part of the message');
     parser.execute(b, 0, b.length);