Reputation: 379
trialObject : {
'color': ['red','blue'],
'size': ['s','m'],
'material': ['cotton']
}
// RECURSION FUNCTION TO MAKE COMBINATIONS
makeObjectVariants(selected){
let key = Object.keys(selected)
if(Object.keys(selected).length === 1){
return selected[key[0]];
} else {
var result = [];
var currentArray = selected[key[0]]
delete selected[key[0]]
var restObjects = this.makeObjectVariants(selected) // call function again
for(var i = 0; i < restObjects.length; i++){
for (var j = 0; j < currentArray.length; j++) {
result.push([restObjects[i] +','+ currentArray[j]]);
}
}
return result; // resultant array
}
}
// OUTPUT
0:["cotton,s,red"]
1:["cotton,s,blue"]
2:["cotton,m,red"]
3:["cotton,m,blue"]
// EXPECTED OUTPUT
[{'material':cotton,'size':s,'color':red},...]
I want the output to contain key value pairs so that the array elements can be recognized which group they fall into.
I am facing problem in adding keys to the elements generated because m unable to keep track of the object keys
Upvotes: 4
Views: 66
Reputation: 13356
If you can use ES6 (default parameters, spread operator, arrow function, ...), the following code do the job:
var trialObject = {
color: ['red','blue'],
size: ['s','m'],
material: ['cotton']
};
var result = buildCombinations(trialObject);
console.log(result);
function buildCombinations(trialObject , keys = Object.keys(trialObject ), keyIndex = 0 , subObj = {}, res = []) {
trialObject[keys[keyIndex]].forEach(element => {
subObj[keys[keyIndex]] = element;
keys[keyIndex + 1] ? buildCombinations(trialObject , keys, keyIndex + 1, subObj, res) : res.push({...subObj});
});
return res;
}
Upvotes: 5