Function diffHead

dash/dash-renderer/src/actions/paths.js:28–28

    const {strs: oldStrs, objs: oldObjs} = oldPaths || {strs: {}, objs: {}};

    const diffHead = path => startingPath.some((v, i) => path[i] !== v);

    const spLen = startingPath.length;
    // if we're updating a subtree, clear out all of the existing items