![Manipulating Characters in a String (The Java™ Tutorials > Learning the Java Language > Numbers and Strings) Manipulating Characters in a String (The Java™ Tutorials > Learning the Java Language > Numbers and Strings)](https://docs.oracle.com/javase/tutorial/figures/java/objects-lastIndexOf.gif)
Manipulating Characters in a String (The Java™ Tutorials > Learning the Java Language > Numbers and Strings)
GitHub - devictoribero/implementation-prototype-string-indexof: Implementation of the String Prototype indexOf method in Vanilla Javascript.
![CA2249: Consider using 'String.Contains' instead of 'String.IndexOf' (code analysis) - .NET | Microsoft Learn CA2249: Consider using 'String.Contains' instead of 'String.IndexOf' (code analysis) - .NET | Microsoft Learn](https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/quality-rules/media/ca2249-codefix.png)
CA2249: Consider using 'String.Contains' instead of 'String.IndexOf' (code analysis) - .NET | Microsoft Learn
![Manipulating Characters in a String (The Java™ Tutorials > Learning the Java Language > Numbers and Strings) Manipulating Characters in a String (The Java™ Tutorials > Learning the Java Language > Numbers and Strings)](https://docs.oracle.com/javase/tutorial/figures/java/objects-substring.gif)