a function which takes a list of strings and returns each line prepended by the correct number @der amateur

[無邊框]

337

a function which takes a list of strings and returns each line prepended by the correct number

“

Write a function which takes a list of strings and returns e

„

分享此文連結 //n.sfs.tw/15357

分享連結 a function which takes a list of strings and returns each line prepended by the correct number@der amateur

(文章歡迎轉載，務必尊重版權註明連結來源)

最後編修

2021-08-22 16:16:20 By

Write a function which takes a list of strings and returns each line prepended by the correct number.

The numbering starts at 1. The format is n: string. Notice the colon and space in between.

Examples:

number(Arrays.asList()) # => []
number(Arrays.asList("a", "b", "c")) // => ["1: a", "2: b", "3: c"]

my solution according to: https://github.com/RomanBulinski/Testing1-2-3.git

import java.util.List;

import java.util.concurrent.atomic.AtomicInteger;

import java.util.stream.Collectors;

import static java.util.stream.Collectors.toList;

public class Main {

public static List<String> number(List<String> lines) {

AtomicInteger i = new AtomicInteger(1);

return lines.stream().map(e -> i.getAndIncrement() + ": " + e).collect(Collectors.toList());

}

best practice:

import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

class LineNumbering {
    static List<String> number(List<String> lines) {
    if (lines.size() == 0) return lines;
    return IntStream.range(0, lines.size())
            .mapToObj(n -> String.format("%d: %s", n+1, lines.get(n)))
            .collect(Collectors.toList());
    }
}

END

你可能感興趣的文章

find all elements in listA belonging to each element of listB and to sum according to listA A bookseller has lots of books classified in 26 categories l

to implement a difference function, which subtracts one list from another and returns the result. Description: Your goal in this kata is to implement a differ

a function that takes an array of integers and a target then added any two equals the target Write a function that takes an array of numbers (integers fo

a function which takes a list of strings and returns each line prepended by the correct number Write a function which takes a list of strings and returns e

JAVA Maximum Length Difference You are given two arrays a1 and a2 of strings. Each string i

隨機好文

how to deal with ubuntu 18.04 network issues bring up different ethernet interfaces on installed ubuntu18.04, then fix yaml indentation problem

how to install teamviewer on ubuntu linux 18.04 LTS install teamviewer by using deb file

到最底端