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@dsamarin

dsamarin/graycode.js

Forked from silentmatt/graycode.js
Last active August 29, 2015 14:27
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Revisions

  1. dsamarin revised this gist Aug 17, 2015. 1 changed file with 4 additions and 7 deletions.
    11 changes: 4 additions & 7 deletions graycode.js
    View file
    Original file line number Diff line number Diff line change
    @@ -9,12 +9,9 @@ Number.fromGrayCode = function(gn) {
    if (gn < 0) {
    throw new RangeError("gray code numbers cannot be negative");
    }
    var g = gn.toString(2).split("");
    var b = [];
    b[0] = g[0];
    for (var i = 1; i < g.length; i++) {
    b[i] = g[i] ^ b[i - 1];
    var mask;
    for (mask = gn >> 1; mask != 0; mask = mask >> 1) {
    gn ^= mask;
    }

    return parseInt(b.join(""), 2);
    return gn;
    };
  2. @silentmatt silentmatt created this gist Jun 26, 2009.
    20 changes: 20 additions & 0 deletions graycode.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,20 @@
    Number.toGrayCode = function(n) {
    if (n < 0) {
    throw new RangeError("cannot convert negative numbers to gray code");
    }
    return n ^ (n >>> 1);
    };

    Number.fromGrayCode = function(gn) {
    if (gn < 0) {
    throw new RangeError("gray code numbers cannot be negative");
    }
    var g = gn.toString(2).split("");
    var b = [];
    b[0] = g[0];
    for (var i = 1; i < g.length; i++) {
    b[i] = g[i] ^ b[i - 1];
    }

    return parseInt(b.join(""), 2);
    };