I want to split a string using a comma and need to populate an array of JSON. I have the following string data
const test='00000001,name1,00000002,name2,00000003,name3,00000004,name4';
console.log(test.split('/[\n,|]/',2));
Output : ['00000001','name1','00000002','name2','00000003','name3','00000004','name4']
But I need output like this
[{id:'00000001',name:'name1'},{id:'00000002',name:'name2'},{id:'00000003',name:'name3'},{id:'00000004',name:'name4'}]
You can easily achieve this result by first match the strings with /(\d)+,(\w)+/gi. It will give you an array of strings.
Then you can use the map to get the desired result.
const test = "00000001,name1,00000002,name2,00000003,name3,00000004,name4";
const regex = /(\d)+,(\w)+/gi;
const result = test.match(regex).map((str) => {
const [id, name] = str.split(",");
return { id, name };
});
console.log(result);you can use Map function to cast your couple key value
map, which is "semantically" not purposed to do what is needed.Assuming the array is of even length, this output can be achieved by doing :
const test='00000001,name1,00000002,name2,00000003,name3,00000004,name4';
let words = test.split(",");
let output = [];
let obj = {};
for (let i = 0; i < words.length; i++) {
if (i % 2 == 0) {
obj = {};
obj["id"] = words[i];
}
else {
obj["name"] = words[i];
output.push(obj);
}
}
console.log(output);Another way could be using a pattern with named capture groups.
For capturing digits for the id, matching the comma and capture word characters for the name:
(?<id>\d+),(?<name>\w+)
const test = '00000001,name1,00000002,name2,00000003,name3,00000004,name4';
const result = Array.from(
test.matchAll(/(?<id>\d+),(?<name>\w+)/g),
m => m.groups
);
console.log(result);If you want to capture all characters for the id and name except for a comma or whitespace char you can use a negated character class [^,\s]+
(?<id>[^,\s]+),(?<name>[^,\s]+)
const test = '00000001,name1,00000002,name2,00000003,name3,00000004,name4';
const result = Array.from(
test.matchAll(/(?<id>[^,\s]+),(?<name>[^,\s]+)/g),
m => m.groups
);
console.log(result);
