convert array of json label in javascript

I have array of JSON like

 [
{title:'button'},
{title:'button'},
{title:'button'},
{title:'button'},
] 

and want to convert it as

[
{title:'button 1'},
{title:'button 2'},
{title:'button 3'},
{title:'button 4'},
]

Answer

Try this please

    var arrJson = [
{title:'button'},
{title:'button'},
{title:'button'},
{title:'button'},
] ,

arrJson.forEach((e,i)=>{
    arrJson [i]['title'] = arrJson[i]['title'] + " " + i;
})