Reading text files line by line in TypeScript using Angular framework is a valuable skill to have

Struggling with reading text files line by line? While console.log(file) may work, it doesn't allow for processing each individual line. Here's my approach:

In api.service.ts, I've implemented a function to fetch the file from the server:

getFile(url: string): Observable<File> {
  return this.httpClient.get<File>(url, {responseType: "text"});
}

Next, in app.component.ts, I declare a private 'resultFile: File' field and populate it with the downloaded file:

getFile() {
    this.apiService.getFile('http://127.0.0.1:8000/media/results/MINERvA/CC0pi/v1.0/nuwro.txt').subscribe(file => {
      this.resultFile = file;
      console.log(this.resultFile);
    });
  }

While console.log() displays the content correctly, looping through resultFile outputs each character instead of each line. This could be due to responseType: "text" converting the data into plain strings.

for (const line of resultFile){
  console.log(line);
}

I'm still searching for a solution to parse the text file line by line. Any suggestions are appreciated as I'm new to JS/TS programming!

Answer №1

One way to handle line breaks is by using newLines:

for (const line of resultFile.split(/[\r\n]+/)){
  console.log(line);
}

To learn more about different line separators, visit: Do line endings differ between Windows and Linux?

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