Title here
Summary here
String Functions in D Programming Language
The standard library’s std.string module provides many useful string-related functions. Here are some examples to give you a sense of the module.
import std.stdio;
import std.string;
import std.array;
void main()
{
// We alias writeln to a shorter name as we'll use it a lot below.
alias p = writeln;
// Here's a sample of the functions available in std.string and std.array.
// Since these are functions from the modules, not methods on the string
// object itself, we need to pass the string in question as the first
// argument to the function. You can find more functions in the
// std.string and std.array module docs.
p("Contains: ", "test".canFind("es"));
p("Count: ", "test".count("t"));
p("HasPrefix: ", "test".startsWith("te"));
p("HasSuffix: ", "test".endsWith("st"));
p("Index: ", "test".indexOf("e"));
p("Join: ", ["a", "b"].join("-"));
p("Repeat: ", "a".repeat(5));
p("Replace: ", "foo".replace("o", "0"));
p("Replace: ", "foo".replaceFirst("o", "0"));
p("Split: ", "a-b-c-d-e".split("-"));
p("ToLower: ", "TEST".toLower());
p("ToUpper: ", "test".toUpper());
}When you run this program, you’ll get:
$ rdmd string_functions.d
Contains: true
Count: 2
HasPrefix: true
HasSuffix: true
Index: 1
Join: a-b
Repeat: aaaaa
Replace: f00
Replace: f0o
Split: ["a", "b", "c", "d", "e"]
ToLower: test
ToUpper: TESTIn this D version, we’ve used equivalent functions from the std.string and std.array modules. Some differences to note:
- D uses
canFindinstead ofContains. startsWithandendsWithare used instead ofHasPrefixandHasSuffix.indexOfis used instead ofIndex.replacereplaces all occurrences by default, whilereplaceFirstreplaces only the first occurrence.- The
Splitfunction returns an array of strings in D, which is why it’s displayed differently in the output.
These functions provide similar functionality to their counterparts, allowing you to manipulate strings effectively in D.