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c# ReplaceFirst

Joseph Charika answered on January 4, 2023 Popularity 7/10 Helpfulness 2/10

answer c# ReplaceFirst

c# ReplaceFirst

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Source: https://csharp-extension.com/en/method/1002132/string-replacefirst

using System.Collections.Generic;
using System.Linq;

public static partial class Extensions
{
    /// <summary>
    ///     A string extension method that replace first occurence.
    /// </summary>
    /// <param name="this">The @this to act on.</param>
    /// <param name="oldValue">The old value.</param>
    /// <param name="newValue">The new value.</param>
    /// <returns>The string with the first occurence of old value replace by new value.</returns>
    public static string ReplaceFirst(this string @this, string oldValue, string newValue)
    {
        int startindex = @this.IndexOf(oldValue);

        if (startindex == -1)
        {
            return @this;
        }

        return @this.Remove(startindex, oldValue.Length).Insert(startindex, newValue);
    }

    /// <summary>
    ///     A string extension method that replace first number of occurences.
    /// </summary>
    /// <param name="this">The @this to act on.</param>
    /// <param name="number">Number of.</param>
    /// <param name="oldValue">The old value.</param>
    /// <param name="newValue">The new value.</param>
    /// <returns>The string with the numbers of occurences of old value replace by new value.</returns>
    public static string ReplaceFirst(this string @this, int number, string oldValue, string newValue)
    {
        List<string> list = @this.Split(oldValue).ToList();
        int old = number + 1;
        IEnumerable<string> listStart = list.Take(old);
        IEnumerable<string> listEnd = list.Skip(old);

        return string.Join(newValue, listStart) +
               (listEnd.Any() ? oldValue : "") +
               string.Join(oldValue, listEnd);
    }
}

Popularity 7/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: c# javascript replace string

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Contributed on Jan 04 2023

Joseph Charika

0 Answers Avg Quality 2/10

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