I would like to know how to Change the value in nested array from array in javascript.
I have a obj and arr in which i need to replace month value with arr value in javascript,
i.e for "12" should be "Dec"
var arr = ["Jan", "Feb","Mar", "Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"]
var obj =[{
"month": "12",
"year": "2013"
},
{
"month": "10",
"year": "2012"
}]
Expected Output:
[{
"month": "Dec",
"year": "2013"
},
{
"month": "Oct",
"year": "2012"
}]
You can use .map() to get the desired output:
const months = ["Jan", "Feb","Mar", "Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"]
const data =[{"month": "12", "year": "2013"}, { "month": "10", "year": "2012"}];
const result = data.map(
o => ({...o, month: months[o.month - 1]})
);
console.log(result);Use Array.map() to iterate the array of objects, use object spread to copy the original properties of the object, and get the month's name from arr using the numeric index (0 based) by subtracting 1 from the month number (1 based):
const arr = ["Jan", "Feb","Mar", "Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"]
const obj =[{ "month": "12", "year": "2013" }, { "month": "10", "year": "2012" }]
const result = obj.map(o => ({
...o, // copy the original properties of the object
month: arr[o.month - 1], // get the month from arr
}))
console.log(result)Similar to other answers using a forEach loop instead of map function
var arr = ["Jan", "Feb","Mar", "Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"];
var obj =[{
"month": "12",
"year": "2013"
},
{
"month": "10",
"year": "2012"
}];
obj.forEach( o=>{
o.month=arr[ o.month-1 ]
})
console.info( obj )
var arr = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
var obj = [{
"month": "12",
"year": "2013"
},
{
"month": "10",
"year": "2012"
}
]
obj.map(ob => ob.month = arr[ob.month - 1])
console.log(obj)This will mapp over your outer obj array and replace each inner objects month key with the corresponding month from the array
Check out this :-
var obj =[{
"month": "12",
"year": "2013"
},
{
"month": "10",
"year": "2012"
}]
var result = [];
obj.forEach((obj, i) => {
obj.month=GetMonthName(obj.month);
result.push(obj);
});
debugger;console.log(result);
function GetMonthName(monthNumber) {
var months = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
return months[monthNumber - 1];
}You dont need an array of month names for conversion, you can use new Date.setMonth() and .toLocaleString to get the same.
var obj =[{
"month": "12",
"year": "2013"
},
{
"month": "10",
"year": "2012"
}]
let out = obj.map(e => ({...e, month: new Date(new Date().setMonth(e.month - 1)).toLocaleString('default', { month: 'short' })}));
console.log(out)