Refactor: DRY

dingosky · dingosky · commit b0b1b88d84a0 · 2017-08-14T14:45:15.000-07:00
diff --git a/lib/charSet.js b/lib/charSet.js
@@ -79,13 +79,15 @@ const _ndxFn = (bitsPerChar) => {
       let slicesPerChunk = lcm(bitsPerChar, bitsPerByte) / bitsPerByte
       let bNum = chunk * slicesPerChunk
 
+      let offset = (slice*bitsPerChar)/bitsPerByte
+      let lOffset = Math.floor(offset)
+      let rOffset = Math.ceil(offset)
+
       let rShift = bitsPerByte - bitsPerChar
-      let lOffset = Math.floor((slice*bitsPerChar)/bitsPerByte)
       let lShift = (slice*bitsPerChar) % bitsPerByte
 
       let ndx = ((bytes[bNum+lOffset]<<lShift)&0xff)>>rShift
 
-      let rOffset = Math.ceil((slice*bitsPerChar)/bitsPerByte)
       let rShiftIt = ((rOffset+1)*bitsPerByte - (slice+1)*bitsPerChar) % bitsPerByte
       if (rShift < rShiftIt) {
         ndx += bytes[bNum+rOffset]>>rShiftIt
