How to turn this: [[a1, b1], [a2, b2]] into this? [{x1: a1, y2: b1}, {x2: a2, y2: b2}]?
Note: the x1 and x2 are newly defined properties (with a1, b1, etc. as values).
Note: This is what I tried:
formatData.map((data, index) => {
const obj = {
dataX: data[index][0],
dataY: data[index][2]
}
data = obj
}
But became stuck.
Simple for loop can do this
var arr = [["a1", "b1"], ["a2", "b2"]];
var newArr = [];
var repeater = ['x','y','z'];//...
for(var i in arr){
var obj = {};
for(var j in arr[i]){
obj[repeater[j]+(parseInt(i)+1)] = arr[i][j];
}
newArr.push(obj);
}
console.log(newArr);
You can use .map of array as below
var temp = [['a1', 'b1'], ['a2', 'b2']];
temp.map(function(arr,index){
var ret = {};
ret['x'+(index+1)]= arr[0];
ret['y'+(index+1)]= arr[1];
return ret;
});
//"[{"x1":"a1","y1":"b1"},{"x2":"a2","y2":"b2"}]"
var data = [[‘a1’, ‘b1’, ‘c1’], [‘a2’, ‘b2’, ‘c2’]] // => x1: a1, y1: c1 no b1 valueUse forEach
var m = [
['a1', 'b1'],
['a2', 'b2']
];
var tempArray = []
m.forEach(function(item, index) {
// create a local object to set the key and value into it
var localObj = {};
// setting key and value
localObj['x' + 1] = item[0];
localObj['y' + 1] = item[1]
// push that pbject to an array
tempArray.push(localObj)
})
console.log(tempArray)You could map the values and take Object.assign for new objects.
var keys = ['x', 'y'],
data = [['a1', 'b1'], ['a2', 'b2']],
result = data.map(a => Object.assign(...keys.map((k, i) => ({ [k]: a[i] }))));
console.log(result);With an object for the wanted keys and corresponding indices.
var keys = { x: 0, y: 2 },
data = [['a1', 'b1', 'c1'], ['a2', 'b2', 'c2']],
result = data.map(a => Object.assign(...Object
.keys(keys)
.map(k => ({ [k]: a[keys[k]] }))
));
console.log(result);
[{x1: a1, y2: b1} ....