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85ab4a5f12
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>
53 lines
1.2 KiB
JavaScript
53 lines
1.2 KiB
JavaScript
'use strict';
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require('../common');
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var assert = require('assert');
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var Transform = require('stream').Transform;
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var parser = new Transform({ readableObjectMode : true });
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assert(parser._readableState.objectMode);
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assert(!parser._writableState.objectMode);
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assert(parser._readableState.highWaterMark === 16);
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assert(parser._writableState.highWaterMark === (16 * 1024));
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parser._transform = function(chunk, enc, callback) {
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callback(null, { val : chunk[0] });
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};
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var parsed;
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parser.on('data', function(obj) {
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parsed = obj;
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});
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parser.end(Buffer.from([42]));
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process.on('exit', function() {
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assert(parsed.val === 42);
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});
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var serializer = new Transform({ writableObjectMode : true });
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assert(!serializer._readableState.objectMode);
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assert(serializer._writableState.objectMode);
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assert(serializer._readableState.highWaterMark === (16 * 1024));
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assert(serializer._writableState.highWaterMark === 16);
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serializer._transform = function(obj, _, callback) {
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callback(null, Buffer.from([obj.val]));
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};
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var serialized;
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serializer.on('data', function(chunk) {
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serialized = chunk;
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});
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serializer.write({ val : 42 });
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process.on('exit', function() {
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assert(serialized[0] === 42);
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});
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