Ioan Dimi
Reputation: 209
If objects into an array have the same value merge them in one object
I have this array of objects. Every object has a unique value label. I would like to compare them by the label value and if the value matches a new object with the unique value should be created.
var test = [{
isnewLanguage: "false",
label: "label1",
languages: [{
language: "English",
questions: [{
choices: "choices1",
fields: "false",
mainText: "MAinText1",
subText: "SubText1"
}]
}],
numberOfChoices: "5"
}, {
isnewLanguage: "false",
label: "label2",
languages: [{
language: "English",
questions: [{
choices: "choices2",
fields: "false",
mainText: "MAinText2",
subText: "SubText2"
}]
}],
numberOfChoices: "5"
}, {
isnewLanguage: "true",
label: "label1",
languages: [{
language: "Italian",
questions: [{
choices: "choicesItalian1",
fields: "false",
mainText: "MainTextItalian1",
subText: "SubTextItalian1"
}]
}],
numberOfChoices: "false"
}, {
isnewLanguage: "true",
label: "label2",
languages: [{
language: "Italian",
questions: [{
choices: "choicesItalian2",
fields: "false",
mainText: "MAinTextItalian2",
subText: "SubTextItalian2"
}]
}],
numberOfChoices: "false"
}, {
isnewLanguage: "true",
label: "label1",
languages: [{
language: "Chinece",
questions: [{
choices: "choicesChinece",
fields: "false",
mainText: "MainTextChinece1",
subText: "SubTextChinece1"
}]
}],
numberOfChoices: "false"
}, {
isnewLanguage: "true",
label: "label2",
languages: [{
language: "Italian",
questions: [{
choices: "choicesItalian2",
fields: "false",
mainText: "MAinTextItalian2",
subText: "SubTextItalian2"
}]
}],
numberOfChoices: "false"
}]
Below is the required structure. Each object with the same label value should be appended to one object with the new languages.
var theRequiredStructure = [{
isnewLanguage: "true",
label: "label1",
languagesTest: [{
language: "English",
questions: [{
choices: "choices1",
fields: "false",
mainText: "MAinText1",
subText: "SubText1"
}]
}, {
language: "Italian",
questions: [{
choices: "choicesItalian1",
fields: "false",
mainText: "MainTextItalian1",
subText: "SubTextItalian1"
}]
}, {
language: "Chinece",
questions: [{
choices: "choicesChinece",
fields: "false",
mainText: "MainTextChinece1",
subText: "SubTextChinece1"
}]
}],
numberOfChoices: "false"
},
{
isnewLanguage: "true",
label: "label2",
languagesTest: [{
language: "English",
questions: [{
choices: "choices2",
fields: "false",
mainText: "MAinText2",
subText: "SubText2"
}]
}, {
language: "Italian",
questions: [{
choices: "choicesItalian2",
fields: "false",
mainText: "MainTextItalian2",
subText: "SubTextItalian2"
}]
}, {
language: "Chinece",
questions: [{
choices: "choicesChinece2",
fields: "false",
mainText: "MainTextChinece2",
subText: "SubTextChinece2"
}]
}],
numberOfChoices: "false"
}Here is my work but obviously it works only for the first element. How can I achieve the required structure for all elements? I prefer mostly ES5 solutions which is understandable to me. Thanks for taking the time
var test = [{
isnewLanguage: "false",
label: "label1",
languages: [{
language: "English",
questions: [{
choices: "choices1",
fields: "false",
mainText: "MAinText1",
subText: "SubText1"
}]
}],
numberOfChoices: "5"
}, {
isnewLanguage: "false",
label: "label2",
languages: [{
language: "English",
questions: [{
choices: "choices2",
fields: "false",
mainText: "MAinText2",
subText: "SubText2"
}]
}],
numberOfChoices: "5"
}, {
isnewLanguage: "true",
label: "label1",
languages: [{
language: "Italian",
questions: [{
choices: "choicesItalian1",
fields: "false",
mainText: "MainTextItalian1",
subText: "SubTextItalian1"
}]
}],
numberOfChoices: "false"
}, {
isnewLanguage: "true",
label: "label2",
languages: [{
language: "Italian",
questions: [{
choices: "choicesItalian2",
fields: "false",
mainText: "MAinTextItalian2",
subText: "SubTextItalian2"
}]
}],
numberOfChoices: "false"
}, {
isnewLanguage: "true",
label: "label1",
languages: [{
language: "Chinece",
questions: [{
choices: "choicesChinece",
fields: "false",
mainText: "MainTextChinece1",
subText: "SubTextChinece1"
}]
}],
numberOfChoices: "false"
}, {
isnewLanguage: "true",
label: "label2",
languages: [{
language: "Italian",
questions: [{
choices: "choicesItalian2",
fields: "false",
mainText: "MAinTextItalian2",
subText: "SubTextItalian2"
}]
}],
numberOfChoices: "false"
}]
var theLanguagesTest = [];
var obj = {};
for (var i = 0; i < test.length; i++) {
if (test[0].label == test[i].label) {
obj = test[i]
}
for (var j = 0; j < test[i].languages.length; j++) {
if (test[0].label == test[i].label) {
theLanguagesTest.push(test[i].languages[j])
obj.languagesTest = theLanguagesTest
}
}
delete test[i].languages;
delete test[i].questions;
}
console.log(obj)Upvotes: 0
Views: 61
Answers (2)
tarkh
Reputation: 2549
Do you mean something like this? It's just a draft code, only to show you the logic (one of possible ways). Read comments in the code below
var test = [{
isnewLanguage: "false",
label: "label1",
languages: [{
language: "English",
questions: [{
choices: "choices1",
fields: "false",
mainText: "MAinText1",
subText: "SubText1"
}]
}],
numberOfChoices: "5"
}, {
isnewLanguage: "false",
label: "label2",
languages: [{
language: "English",
questions: [{
choices: "choices2",
fields: "false",
mainText: "MAinText2",
subText: "SubText2"
}]
}],
numberOfChoices: "5"
}, {
isnewLanguage: "true",
label: "label1",
languages: [{
language: "Italian",
questions: [{
choices: "choicesItalian1",
fields: "false",
mainText: "MainTextItalian1",
subText: "SubTextItalian1"
}]
}],
numberOfChoices: "false"
}, {
isnewLanguage: "true",
label: "label2",
languages: [{
language: "Italian",
questions: [{
choices: "choicesItalian2",
fields: "false",
mainText: "MAinTextItalian2",
subText: "SubTextItalian2"
}]
}],
numberOfChoices: "false"
}, {
isnewLanguage: "true",
label: "label1",
languages: [{
language: "Chinece",
questions: [{
choices: "choicesChinece",
fields: "false",
mainText: "MainTextChinece1",
subText: "SubTextChinece1"
}]
}],
numberOfChoices: "false"
}, {
isnewLanguage: "true",
label: "label2",
languages: [{
language: "Italian",
questions: [{
choices: "choicesItalian2",
fields: "false",
mainText: "MAinTextItalian2",
subText: "SubTextItalian2"
}]
}],
numberOfChoices: "false"
}];
// New array
const result = [];
// Map object to map key -> result array index
const map = {};
// Simple loop
for(let i = 0; i < test.length; i++) {
// If map contains key with current label
// then we have it in result array
if(map[test[i].label] && result[map[test[i].label]] === 0 || result[map[test[i].label]]) {
// Push same label languages content to results array languageTests subarray
result[map[test[i].label]].languageTests.push(test[i].languages[0]);
} else {
// Else create map record
map[test[i].label] = Object.keys(map).length;
// Copy and modify current object
const item = test[i];
// Create languageTests sub array
item.languageTests = [];
// Copy languages object there
item.languageTests.push(item.languages[0]);
// delete languages
delete item.languages;
// Push re-formed item to results
result.push(item);
}
}
// Log
console.log(result);Upvotes: 1
kewlashu
Reputation: 1109
You can do it like this also:
var test = [{
isnewLanguage: "false",
label: "label1",
languages: [{
language: "English",
questions: [{
choices: "choices1",
fields: "false",
mainText: "MAinText1",
subText: "SubText1"
}]
}],
numberOfChoices: "5"
}, {
isnewLanguage: "false",
label: "label2",
languages: [{
language: "English",
questions: [{
choices: "choices2",
fields: "false",
mainText: "MAinText2",
subText: "SubText2"
}]
}],
numberOfChoices: "5"
}, {
isnewLanguage: "true",
label: "label1",
languages: [{
language: "Italian",
questions: [{
choices: "choicesItalian1",
fields: "false",
mainText: "MainTextItalian1",
subText: "SubTextItalian1"
}]
}],
numberOfChoices: "false"
}, {
isnewLanguage: "true",
label: "label2",
languages: [{
language: "Italian",
questions: [{
choices: "choicesItalian2",
fields: "false",
mainText: "MAinTextItalian2",
subText: "SubTextItalian2"
}]
}],
numberOfChoices: "false"
}, {
isnewLanguage: "true",
label: "label1",
languages: [{
language: "Chinece",
questions: [{
choices: "choicesChinece",
fields: "false",
mainText: "MainTextChinece1",
subText: "SubTextChinece1"
}]
}],
numberOfChoices: "false"
}, {
isnewLanguage: "true",
label: "label2",
languages: [{
language: "Italian",
questions: [{
choices: "choicesItalian2",
fields: "false",
mainText: "MAinTextItalian2",
subText: "SubTextItalian2"
}]
}],
numberOfChoices: "false"
}]
var byUniqueLabels = {};
var labelsArray = [];
for (var i = 0; i < test.length; i++) {
if (byUniqueLabels[test[i].label] == "" || byUniqueLabels[test[i].label] == undefined) {
byUniqueLabels[test[i].label] = { 'isnewLanguage': test[i].isnewLanguage, 'label': test[i].label, languagesTest: [] };
}
for (var j = 0; j < test[i].languages.length; j++) {
byUniqueLabels[test[i].label].languagesTest.push(test[i].languages[j]);
}
}
for (label in byUniqueLabels) {
labelsArray.push(byUniqueLabels[label]);
}
console.log(labelsArray);Upvotes: 1
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