nodejs · Mnwa · Dec 29, 2018 · Dec 30, 2018
diff --git a/lib/buffer.js b/lib/buffer.js
@@ -102,7 +102,7 @@ const constants = Object.defineProperties({}, {
 });
 Buffer.poolSize = 8 * 1024;
-  
-var poolSize, poolOffset, allocPool;
+  
+let poolSize, poolOffset, allocPool;
 setupBufferJS(Buffer.prototype, bindingObj);
@@ -221,7 +221,7 @@ Buffer.from = function from(value, encodingOrOffset, length) {
  if (valueOf !== null && valueOf !== undefined && valueOf !== value)
    return Buffer.from(valueOf, encodingOrOffset, length);
-  
-  var b = fromObject(value);
+  
+  const b = fromObject(value);
  if (b)
    return b;
@@ -307,13 +307,10 @@ Buffer.allocUnsafeSlow = function allocUnsafeSlow(size) {
 // If --zero-fill-buffers command line argument is set, a zero-filled
 // buffer is returned.
 function SlowBuffer(length) {
-  
-  const len = +length;
-  
-  // eslint-disable-next-line eqeqeq
-  
-  if (len != length)
-  
-    length = 0;
-  
-  else
-  
-    assertSize(len);
-  
-  return createUnsafeBuffer(len);
+  
+  if (typeof length !== 'number')
+  
+    length = +length;
+  
+  assertSize(length);
+  
+  return createUnsafeBuffer(length);
 }
 Object.setPrototypeOf(SlowBuffer.prototype, Uint8Array.prototype);
@@ -326,7 +323,7 @@ function allocate(size) {
  if (size < (Buffer.poolSize >>> 1)) {
    if (size > (poolSize - poolOffset))
      createPool();
-  
-    var b = new FastBuffer(allocPool, poolOffset, size);
+  
+    const b = new FastBuffer(allocPool, poolOffset, size);
    poolOffset += size;
    alignPool();
    return b;
@@ -335,7 +332,7 @@ function allocate(size) {
 }
 function fromString(string, encoding) {
-  
-  var length;
+  
+  let length;
  if (typeof encoding !== 'string' || encoding.length === 0) {
    if (string.length === 0)
      return new FastBuffer();
@@ -354,7 +351,7 @@ function fromString(string, encoding) {
  if (length > (poolSize - poolOffset))
    createPool();
-  
-  var b = new FastBuffer(allocPool, poolOffset, length);
+  
+  let b = new FastBuffer(allocPool, poolOffset, length);
  const actual = b.write(string, encoding);
  if (actual !== length) {
    // byteLength() may overestimate. That's a rare case, though.
@@ -456,7 +453,7 @@ Buffer.isEncoding = function isEncoding(encoding) {
 Buffer[kIsEncodingSymbol] = Buffer.isEncoding;
 Buffer.concat = function concat(list, length) {
-  
-  var i;
+  
+  let i;
  if (!Array.isArray(list)) {
    throw new ERR_INVALID_ARG_TYPE(
      'list', ['Array', 'Buffer', 'Uint8Array'], list);
@@ -473,10 +470,10 @@ Buffer.concat = function concat(list, length) {
    length = length >>> 0;
  }
-  
-  var buffer = Buffer.allocUnsafe(length);
-  
-  var pos = 0;
+  
+  const buffer = Buffer.allocUnsafe(length);
+  
+  let pos = 0;
  for (i = 0; i < list.length; i++) {
-  
-    var buf = list[i];
+  
+    const buf = list[i];
    if (!isUint8Array(buf)) {
      // TODO(BridgeAR): This should not be of type ERR_INVALID_ARG_TYPE.
      // Instead, find the proper error code for this.
@@ -791,7 +788,7 @@ function bidirectionalIndexOf(buffer, val, byteOffset, encoding, dir) {
 }
 function slowIndexOf(buffer, val, byteOffset, encoding, dir) {
-  
-  var loweredCase = false;
+  
+  let loweredCase = false;
  for (;;) {
    switch (encoding) {
      case 'utf8':
@@ -926,7 +923,7 @@ Buffer.prototype.write = function write(string, offset, length, encoding) {
      length = undefined;
    }
-  
-    var remaining = this.length - offset;
+  
+    const remaining = this.length - offset;
    if (length === undefined || length > remaining)
      length = remaining;