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Optimization error in update operation #499

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Optimization error in update operation #499

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ac884e7
Optimization error in update operation
anthony-redFox Dec 29, 2017
987448c
Remove currentPath and use path for throw error
anthony-redFox Dec 29, 2017
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86 changes: 21 additions & 65 deletions src/update.js
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Expand Up @@ -23,6 +23,10 @@ function err(operation, expectedTarget, path) {
);
}

const tr = true;
const arrayMethods = {push: tr, unshift: tr, concat: tr, splice: tr, pop: tr, shift: tr};
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Will be nice to use Set.
@Yomguithereal what do you think about drop IE9 and IE10?

const objectMethods = {merge: tr, deepMerge: tr};

/**
* Function aiming at applying a single update operation on the given tree's
* data.
Expand All @@ -38,29 +42,37 @@ export default function update(data, path, operation, opts = {}) {

// Dummy root, so we can shift and alter the root
const dummy = {root: data},
dummyPath = ['root', ...path],
currentPath = [];
dummyPath = ['root', ...path];

// Walking the path
let p = dummy,
i,
l,
s;

for (i = 0, l = dummyPath.length; i < l; i++) {
const l = dummyPath.length;
for (let i = 0; i < l; i++) {

// Current item's reference is therefore p[s]
// The reason why we don't create a variable here for convenience
// is because we actually need to mutate the reference.
s = dummyPath[i];

// Updating the path
if (i > 0)
currentPath.push(s);

// If we reached the end of the path, we apply the operation
if (i === l - 1) {

if (operationType in arrayMethods && !type.array(p[s])) {
throw err(
operationType,
'array',
path
);
}
if (operationType in objectMethods && !type.object(p[s])) {
throw err(
operationType,
'object',
path
);
}
/**
* Set
*/
Expand Down Expand Up @@ -125,13 +137,6 @@ export default function update(data, path, operation, opts = {}) {
* Push
*/
else if (operationType === 'push') {
if (!type.array(p[s]))
throw err(
'push',
'array',
currentPath
);

if (opts.persistent)
p[s] = p[s].concat([value]);
else
Expand All @@ -142,13 +147,6 @@ export default function update(data, path, operation, opts = {}) {
* Unshift
*/
else if (operationType === 'unshift') {
if (!type.array(p[s]))
throw err(
'unshift',
'array',
currentPath
);

if (opts.persistent)
p[s] = [value].concat(p[s]);
else
Expand All @@ -159,13 +157,6 @@ export default function update(data, path, operation, opts = {}) {
* Concat
*/
else if (operationType === 'concat') {
if (!type.array(p[s]))
throw err(
'concat',
'array',
currentPath
);

if (opts.persistent)
p[s] = p[s].concat(value);
else
Expand All @@ -176,13 +167,6 @@ export default function update(data, path, operation, opts = {}) {
* Splice
*/
else if (operationType === 'splice') {
if (!type.array(p[s]))
throw err(
'splice',
'array',
currentPath
);

if (opts.persistent)
p[s] = splice.apply(null, [p[s]].concat(value));
else
Expand All @@ -193,13 +177,6 @@ export default function update(data, path, operation, opts = {}) {
* Pop
*/
else if (operationType === 'pop') {
if (!type.array(p[s]))
throw err(
'pop',
'array',
currentPath
);

if (opts.persistent)
p[s] = splice(p[s], -1, 1);
else
Expand All @@ -210,13 +187,6 @@ export default function update(data, path, operation, opts = {}) {
* Shift
*/
else if (operationType === 'shift') {
if (!type.array(p[s]))
throw err(
'shift',
'array',
currentPath
);

if (opts.persistent)
p[s] = splice(p[s], 0, 1);
else
Expand All @@ -238,13 +208,6 @@ export default function update(data, path, operation, opts = {}) {
* Merge
*/
else if (operationType === 'merge') {
if (!type.object(p[s]))
throw err(
'merge',
'object',
currentPath
);

if (opts.persistent)
p[s] = shallowMerge({}, p[s], value);
else
Expand All @@ -255,13 +218,6 @@ export default function update(data, path, operation, opts = {}) {
* Deep merge
*/
else if (operationType === 'deepMerge') {
if (!type.object(p[s]))
throw err(
'deepMerge',
'object',
currentPath
);

if (opts.persistent)
p[s] = deepMerge({}, p[s], value);
else
Expand Down