javascript Json : change attribute value in a json structure

Question

I am trying to change a specific key's value in json as below :

input = [{"201708":10,"201709": 12, "metric":"attritionManaged"},{"201708":10,"201709": 12, "metric":"attritionUnManaged"},{"201708":10,"201709": 12, "metric":"EHC"}]

output= [{"201708":10,"201709": 12, "metric":"managedAttrition"},{"201708":10,"201709": 12, "metric":"unmanagedAttrition"},{"201708":10,"201709": 12, "metric":"EndingHeadcount"}]

i have tried looping in the input like input.forEach(element =>{//code})but somewhere iam missing.

This is a duplicate question: stackoverflow.com/questions/4430193/… — Michael Conard
– Michael Conard, Commented Jun 18, 2018 at 22:19
Possible duplicate of Add or change a value of JSON key with jquery or javascript — Heretic Monkey
– Heretic Monkey, Commented Jun 18, 2018 at 22:31

pedrualves · Accepted Answer · 2018-06-18 22:29:59Z

0

This not works??

let input = [{"201708":10,"201709": 12, "metric":"attritionManaged"},{"201708":10,"201709": 12, "metric":"attritionUnManaged"},{"201708":10,"201709": 12, "metric":"EHC"}]

 input.forEach(i=>{
     i.metric = 'abc'
 })

 input.forEach(i=>{
     alert(i.metric) 
 })

answered Jun 18, 2018 at 22:29

pedrualves

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Comments

dhaker · Accepted Answer · 2018-06-18 23:01:58Z

I have used spread operator: Spread syntax allows an iterable such as an array expression or string to be expanded in places where zero or more arguments (for function calls) or elements (for array literals) are expected, or an object expression to be expanded in places where zero or more key-value pairs (for object literals) are expected.

example:

var a = [1,2,3]
var b = [4,5,6]
a.push(...b)
a //which is [1,2,3,4,5,6]

input = [{"201708":10,"201709": 12, "metric":"attritionManaged"},{"201708":10,"201709": 12, "metric":"attritionUnManaged"},{"201708":10,"201709": 12, "metric":"EHC"}]
	
var output = input;
output.forEach(function(currentValue, index, arr){
	currentValue.metric = getString(currentValue.metric);
})

function getString(str){
	var arr = [];
	var arr1 = [];
	var isUpperArrived = 0;
	if(str.length>0)
	{
		arr.push(str[0].toUpperCase());
	}
	
	for(var i=1;i<str.length;i++)
	{
		if(str[i]==str[i].toUpperCase())
		{
			isUpperArrived=1;
			arr1.push(str[i].toLowerCase());
		}else{
			if(!isUpperArrived)
			{
			  arr.push(str[i]);
			}else{
				arr1.push(str[i]);
			}
		}
		
	}
	//pushing arr using spread operator
	arr1.push(...arr);
	return arr1.join('');
}


console.log(output);

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