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@daveyerwinJun 19.2020 — #
How do I transform the content of this array?
Hi! How do I transform the first array of scores into the second one? Rather than having a list of score object, I’d like to get a list of user objects. Each user object must have username and difficultyLevels properties, with the latter grouping the scores by difficulty.
“`
const scoresList = [
{
scoredBy: {
username: ‘sleekcollins’
},
scoreValue: 14,
difficultyLevel: ‘easy’,
},
{
scoredBy: {
username: ‘sleekcollins’
},
scoreValue: 18,
difficultyLevel: ‘easy’,
},
{
scoredBy: {
username: ‘sleekcollins’
},
scoreValue: 24,
difficultyLevel: ‘hard’,
},
{
scoredBy: {
username: ‘aaronrodgers’
},
scoreValue: 32,
difficultyLevel: ‘medium’,
},
{
scoredBy: {
username: ‘patmahomes’
},
scoreValue: 20,
difficultyLevel: ‘expert’,
},
{
scoredBy: {
username: ‘patmahomes’
},
scoreValue: 17,
difficultyLevel: ‘easy’,
},
];
const scoresByUser = [
{
username: ‘sleekcollins’,
difficultyLevels: [
{
difficulty: ‘easy’,
scores: [14, 18]
},
{
difficulty: ‘medium’,
scores: []
},
{
difficulty: ‘hard’,
scores: [24]
},
{
difficulty: ‘expert’,
scores: []
}
]
},
{
username: ‘aaronrodgers’,
difficultyLevels: [
{
difficulty: ‘easy’,
scores: [0]
},
{
difficulty: ‘medium’,
scores: [32]
},
{
difficulty: ‘hard’,
scores: []
},
{
difficulty: ‘expert’,
scores: []
}
]
},
{
username: ‘patmahomes’,
difficultyLevels: [
{
difficulty: ‘easy’,
scores: [17]
},
{
difficulty: ‘medium’,
scores: []
},
{
difficulty: ‘hard’,
scores: []
},
{
difficulty: ‘expert’,
scores: [20]
}
]
},
];
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@daveyerwinJun 19.2020 — #``<i>
</i><script>
"use strict";
function Obj(username){
this.username = username;
this.difficultyLevels = [];
this.difficultyLevels.push({difficulty: 'easy', scores:[]});
this.difficultyLevels.push({difficulty: 'medium', scores:[]});
this.difficultyLevels.push({difficulty: 'hard', scores:[]});
this.difficultyLevels.push({difficulty: 'expert', scores:[]});
}
const scoresList = [
{
scoredBy: {
username: 'sleekcollins'
},
scoreValue: 14,
difficultyLevel: 'easy',
},
{
scoredBy: {
username: 'sleekcollins'
},
scoreValue: 18,
difficultyLevel: 'easy',
},
{
scoredBy: {
username: 'sleekcollins'
},
scoreValue: 24,
difficultyLevel: 'hard',
},
{
scoredBy: {
username: 'aaronrodgers'
},
scoreValue: 32,
difficultyLevel: 'medium',
},
{
scoredBy: {
username: 'patmahomes'
},
scoreValue: 20,
difficultyLevel: 'expert',
},
{
scoredBy: {
username: 'patmahomes'
},
scoreValue: 17,
difficultyLevel: 'easy',
},
];
var username = [];
var scoresByUser = [];
var obj,obj1,obj2,name;
for(let i=0;i<scoresList.length;i++){
obj1=scoresList[i];
name=obj1.scoredBy.username;
if(username.indexOf(name)==-1){
username.push(name);
scoresByUser.push(new Obj(name))
}
for(let i=0;i<scoresByUser.length;i++){
obj = scoresByUser[i];
if(obj.username == name)break;
}
for(let i=0;i<obj.difficultyLevels.length;i++){
obj2 = obj.difficultyLevels[i];
if(obj1.difficultyLevel == obj2.difficulty)break;
}
obj2.scores.push(obj1.scoreValue)
}
console.log(scoresByUser);
</script><i>
</i>``