I have data like this:
var data = {
value1: ["a", "b", "c"],
value2: [1, 2, 3]
}
I want to convert it to:
var newData = [
{value1: "a", value2: 1},
{value1: "b", value2: 2},
{value1: "c", value2: 3}
]
How can I achieve this with javascript?
Use Array#map method to generate the array.
var data = {
value1: ["a", "b", "c"],
value2: [1, 2, 3]
};
// iterate over the first property
var res = data.value1.map(function(v, i) {
// generate the array object element
return {
value1: v,
value2: data.value2[i]
}
});
console.log(res);UPDATE 1 : If the property names are unknown then you can do something like this.
var data = {
value1: ["a", "b", "c"],
value2: [1, 2, 3]
};
// get all property names
var keys = Object.keys(data);
// iterate over the first property name array
var res = data[keys[0]].map(function(v, i) {
// generate the object by iterating over the keys array
return keys.reduce(function(obj, k) {
// define the object property
obj[k] = data[k][i];
// return the objet reference
return obj;
// set initial value as empty object
}, {});
});
console.log(res);UPDATE 2 : If array length can be different then you need to get the larger array from the collection.
var data = {
value1: ["a", "b", "c", "d"],
value2: [1, 2, 3],
value3: [1, 2, 3, 5, 6, 7, 8]
};
// get all property names
var keys = Object.keys(data);
// iterate over the largest array
var res = data[
// get the largest array holding key from the keys array
keys.reduce(function(k, k1) {
return data[k1].length > data[k].length ? k1 : k;
})
].map(function(v, i) {
// generate the object by iterating over the keys array
return keys.reduce(function(obj, k) {
// check element exist in the array by comparing
// the length and index
if (data[k].length > i)
// define the property if value exist in index
obj[k] = data[k][i];
// return the objet reference
return obj;
// set initial value as empty object
}, {});
});
console.log(res);
You could use a complete dynamic version for it, without giving keys.
It works for arrays with unequal length as well.
function pivot(object) {
return Object.keys(object).reduce(function (r, k) {
object[k].forEach(function (a, i) {
r[i] = r[i] || {};
r[i][k] = a;
});
return r;
}, []);
}
console.log(pivot({ value1: ["a", "b", "c"], value2: [1, 2, 3] }));
console.log(pivot({ value1: ["a", "b", "c", "d"], value2: [1, 2, 3], value3: [1, 2, 3, 5, 6, 7, 8] }));.as-console-wrapper { max-height: 100% !important; top: 0; }var data = {
value1: ["a", "b", "c"],
value2: [1, 2, 3]
}
var newData = [];
for (var i=0; i<data.value1.length; i++) {
var obc = {}
obc['value1'] = data.value1[i];
obc['value2'] = data.value2[i];
newData.push(obc)
}
console.log(newData)
var data = {
value1: ["a", "b", "c"],
value2: [1, 2, 3]
}
var newData = [];
for(var i=0;i<data.value1.length;i++){
var obj = {
value1: data.value1[i],
value2: data.value2[i]
}
newData.push(obj);
}
Try this:
var data = {
value1: ["a", "b", "c"],
value2: [1, 2, 3]
};
var arr = [];
data[Object.keys(data)[0]].forEach(function (value, index) {
arr[index] = {};
Object.keys(data).forEach(function (key) {
arr[index][key]=data[key][index];
});
});
console.log(arr)With this solution you can modify the value1, value2 props, or you can add more if needed.
value1, and push little objects made from the value fromvalue1and the value fromvalue2at the same index onto an array.value1andvalue2fixed?