I have an array like ["1 apple", "2 watermelon"] and I want to convert it to object like {apple: 1, watermelon: 2}
Here is my code but I think I did something wrong:
const object = {}
arr.forEach(a => {
let key = a.match(/\d+/g)
let value = a.match(/\D+/g)
Object.assign(object, {
key: value
})
})
Use Array.map() and Object.fromEntries()
const data = ["1 apple", "2 watermelon"];
const result = Object.fromEntries(
data.map(function(item) {
let itemSplit = item.split(" ");
if( itemSplit.length > 2 ) { // ["1 apple", "2 water melon"]
return [ itemSplit.shift(), itemSplit.join(" ") ].reverse();
}
return itemSplit.reverse();
})
);
console.log(result);
["1 apple", "2 water melon"]When you use the g flag for your regex, it returns an array of matches, so you can get the first match by using [0]. For assigning one key, you don't need Object.assign:
const arr = ["1 apple", "2 watermelon"];
const object = {};
arr.forEach(a => {
let value = a.match(/\d+/g)[0];
let key = a.match(/\D+/g)[0];
object[key] = value;
});
This still has the issue of the leading space being in the string, so you could say value = a.match(/\D+/g)[0].substr(1);, or if you're guaranteed to have the words separated by a space you could just split on space:
const arr = ["1 apple", "2 watermelon"];
const object = {};
arr.forEach(a => {
const [value, ...keys] = a.split(" ");
object[keys.join(" ")] = value;
});
const arr = ["1 apple", "2 watermelon"];
const object = {}
arr.forEach(a => {
let key = a.match(/\d+/g)
let value = a.match(/\D+/g)
Object.assign(object, {
[value[0]]: key[0]
})
})
console.log(object)value is an array, you need to specify an index to the element inside, also key in this case is a variable and you have to use the [] syntax when defining an object key from a variable.
This isn't however the best solution to do this job.
const arr=["1 apple", "2 watermelon"];
const object = {}
arr.forEach(item => {
const [val,key]=item.split(' ');
object[key]=Number(val,10);
});
console.log(object);
Use the split function to split the string at white space. Use Array de-structuring to capture the constituent parts (i.e in first iteration item.split(' ') will return ['1','apple'] and subsequently val is assigned '1' and key 'watermelon'). Use the Number function to convert the string into an integer (the optional parameter is base, here it is 10).
