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ViewsHow to parse a text file with delimiter using FileReader
I working on an Angular project which I have to upload a .txt file then parse all its lines loop over them. I used this peace of code but it just returns me a text format just like opening it in notepad and that's not what I want, my goal is to every single data with the delimiter ; and console that in an array ob objects.
this is my code:
fileChangeListener($event: any): void {
const file = $event.target.files[0];
let fileReader = new FileReader();
fileReader.onload = (e) => {
let data = fileReader.result;
console.log("FileREAAAAAAAAAAADER \n" + data);
}
fileReader.readAsText(file);
this is my .txt file structure:
1234;06/07/22;06/07/22;VRT; ;31070;some String content;some String content; ;147.10;A;1234
1234;06/07/22;06/07/22;VRT; ;31070;some String content;some String content; ;147.10;A;1234
1234;06/07/22;06/07/22;VRT; ;31070;some String content;some String content; ;147.10;A;1234
1234;06/07/22;06/07/22;VRT; ;31070;some String content;some String content; ;147.10;A;1234
1234;06/07/22;06/07/22;VRT; ;31070;some String content;some String content; ;147.10;A;1234
in console, the code I wrote displays just like the above structure where the output should be like this:
·
Juan Pablo Isaza
1 answers
Answer question0
I have modified the your code to make a string[][] like you needed.
Not knowing what you want to do with the data, it is just local to that function.
dummyArr is what you want :)
Kept it kinda bland so you can modify it to your future needs
Hope this helps!
fileChangeListener(event: any): void {
console.log("submitted here")
const file = event.target.files[0];
let fileReader = new FileReader();
fileReader.onload = (e) => {
let data = fileReader.result;
console.log("FileREAAAAAAAAAAADER \n" + data);
this.parseData(data)
}
fileReader.readAsText(file);
}
parseData(data: string | ArrayBuffer | null){
var dummyArr: string[][] = []
var eachLine = data?.toString().split('\n');
eachLine?.forEach((line: string) => {
let arr = []
let str = ""
for(var i = 0; i < line.length; i++){
if(line[i] == ';'){
arr.push(str)
str = ""
}else{
str += line[i]
}
}
arr.push(str)
dummyArr.push(arr)
})
console.log(dummyArr);
}
·
Juan Pablo Isaza
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