how do i remove object from an array in typescript?
"revenues":[
{
"drug_id":"20",
"quantity":10
},
{
"drug_id":"30",
"quantity":1
}]
so i want to remove the drug_id from all objects. how do i achieve that? Thank You!
you could use that :
this.revenues = this.revenues.map(r => ({quantity: r.quantity}));
For a more generic way of doing this :
removePropertiesFromRevenues(...props: string[]) {
this.revenues = this.revenues.map(r => {
const obj = {};
for (let prop in r) { if (!props.includes(prop) { obj[prop] = r[prop]; } }
return obj;
});
}
You can use the Array.prototype.map like this:
revenues = this.revenues.map(r => ({quantity: r.quantity}));
The Array.prototype.map will take each item of your revenues array and you can transform it before returning it.
The map() method creates a new array with the results of calling a provided function on every element in the calling array.
So if you want for example double each quantity and add or rename some fields, you can do like below:
revenues = this.revenues.map(r => ({quantity: r.quantity, quantity2: r.quantity * 2}));
Array.prototype.map will transform your array to a new one depending on he given transformation rules returned by the callback. In this case, with the implicit return, our callback return a new object that holds only this field {quantity: r.quantity}revenues = revenues.map(item => { drug_id: item.drug_id, quantity : item.quantity }). I will edit my answer to give you more explanation on how map worksthis should work
revenues.forEach((object) => delete object.drug_id );
