Currently, I am working with an array that looks like this:
arr = [{id:'first',name:'John'},{id:'fifth',name:'Kat'},{id:'eitghth',name:'Isa'}]arr = [{id:'first',name:'John'},{id:'sixth',name:'Kat'},{id:'eitghth',name:'Isa'}]I only need to modify one part of an item. How can I achieve this using JavaScript?
To locate the entry and update its id attribute, you can utilize the Array.prototype.find method:
const arr = [{id:'first',name:'John'},{id:'fifth',name:'Kat'},{id:'eitghth',name:'Isa']];
const entry = arr.find(item => item.id === 'fifth');
entry.id = 'sixth';
console.log(arr);If you want to replace a specific entry by finding its index, you can also make use of Array.prototype.findIndex:
const arr = [{id:'first',name:'John'},{id:'fifth',name:'Kat'},{id:'eitghth',name:'Isa']];
const targetIndex = arr.findIndex(item => item.id === 'fifth');
arr[targetIndex].id = 'sixth';
console.log(arr);If there are multiple entries with the same ID in the array and you need to update all of them, iterating through the array is a better approach:
const arr = [{id:'fifth',name:'Kat'},{id:'fifth',name:'Kat'},{id:'fifth',name:'Kat'}];
arr.forEach(item => {
if (item.id === 'fifth') {
item.id = 'sixth';
}
});
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