Merge pull request #29 from adelmojnr/master

Alterando variáveis de var para const e let no arquivo barcode.js

lib/barcode.js

@@ -1,5 +1,5 @@
 exports.binaryRepresentationForBarcodeData = function (barcodeData) {
-  var digits = {
+  const digits = {
     0: '00110',
     1: '10001',
     2: '01001',
@@ -12,17 +12,17 @@ exports.binaryRepresentationForBarcodeData = function (barcodeData) {
     9: '01010'
   }
 
-  if (barcodeData.length % 2 != 0) {
+  if (barcodeData.length % 2 !== 0) {
     barcodeData = '0' + barcodeData
   }
 
-  var binaryDigits = '0000'
+  let binaryDigits = '0000'
   // Start of barcode
-  for (var i = 0; i < barcodeData.length; i += 2) {
-    var digit1 = digits[parseInt(barcodeData[i])]
-    var digit2 = digits[parseInt(barcodeData[i + 1])]
+  for (let i = 0; i < barcodeData.length; i += 2) {
+    const digit1 = digits[parseInt(barcodeData[i])]
+    const digit2 = digits[parseInt(barcodeData[i + 1])]
 
-    for (var j = 0; j < digit1.length; j++) {
+    for (let j = 0; j < digit1.length; j++) {
       binaryDigits += digit1[j] + digit2[j]
     }
   }
@@ -35,9 +35,9 @@ exports.binaryRepresentationForBarcodeData = function (barcodeData) {
 
 // Convert a value to a little endian hexadecimal value
 exports._getLittleEndianHex = function (value) {
-  var result = []
+  const result = []
 
-  for (var bytes = 4; bytes > 0; bytes--) {
+  for (let bytes = 4; bytes > 0; bytes--) {
     result.push(String.fromCharCode(value & 0xff))
     value >>= 0x8
   }
@@ -46,7 +46,7 @@ exports._getLittleEndianHex = function (value) {
 }
 
 exports._bmpHeader = function (width, height) {
-  var numFileBytes = exports._getLittleEndianHex(width * height)
+  const numFileBytes = exports._getLittleEndianHex(width * height)
   width = exports._getLittleEndianHex(width)
   height = exports._getLittleEndianHex(height)
 
@@ -69,25 +69,25 @@ exports._bmpHeader = function (width, height) {
 }
 
 exports.bmpLineForBarcodeData = function (barcodeData) {
-  var binaryRepresentation = exports.binaryRepresentationForBarcodeData(barcodeData)
+  const binaryRepresentation = exports.binaryRepresentationForBarcodeData(barcodeData)
 
-  var bmpData = []
-  var black = true
-  var offset = 0
+  let bmpData = []
+  let black = true
+  let offset = 0
 
-  for (var i = 0; i < binaryRepresentation.length; i++) {
-    var digit = binaryRepresentation[i]
-    var color = black ? String.fromCharCode(0, 0, 0, 0) : String.fromCharCode(255, 255, 255, 0)
-    var pixelsToDraw = (digit == '0') ? 1 : 3
+  for (let i = 0; i < binaryRepresentation.length; i++) {
+    const digit = binaryRepresentation[i]
+    const color = black ? String.fromCharCode(0, 0, 0, 0) : String.fromCharCode(255, 255, 255, 0)
+    let pixelsToDraw = (digit === '0') ? 1 : 3
 
-    for (var j = 0; j < pixelsToDraw; j++) {
+    for (let j = 0; j < pixelsToDraw; j++) {
       bmpData[offset++] = color
     }
 
     black = !black
   }
 
-  var bmpHeader = exports._bmpHeader(offset - 1, 1)
-  var bmpBuffer = new Buffer(bmpHeader + bmpData.join(''), 'binary')
+  const bmpHeader = exports._bmpHeader(offset - 1, 1)
+  const bmpBuffer = new Buffer(bmpHeader + bmpData.join(''), 'binary')
   return bmpBuffer.toString('base64')
 }