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skelet00r/merge.js

Last active March 7, 2018 16:47
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Revisions

  1. James Delibas revised this gist Mar 7, 2018. No changes.
  2. James Delibas revised this gist Mar 7, 2018. No changes.
  3. James Delibas created this gist Mar 7, 2018.
    21 changes: 21 additions & 0 deletions merge.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,21 @@
    function merge(dest, src, discriminator) {
    if (!discriminator) {
    return [...dest, ...src];
    }
    const result = [...dest];
    src.forEach((s) => {
    const match = dest.find(d => d[discriminator] === s[discriminator]);
    if (match) {
    const oldVal = JSON.stringify(match);
    const newVal = JSON.stringify(s);
    if (oldVal !== newVal) {
    const index = result.indexOf(match);
    result[index] = s;
    return;
    }
    return;
    }
    result.push(s);
    });
    return result;
    }