Szathmáry László honlapja @ DEIK | DLang / String operations

Strip

(1) `strip()`
def main(): s = " aa " print("'{0}'".format(s.strip())) # 'aa' print("'{0}'".format(s.lstrip())) # 'aa ' print("'{0}'".format(s.rstrip())) # ' aa'	import std.stdio; import std.string; // from here void main() { string s = " aa "; writefln("'%s'", s.strip()); // 'aa' writefln("'%s'", s.stripLeft()); // 'aa ' writefln("'%s'", s.stripRight()); // ' aa' }

(2) `replace()`
def main(): s = "cat dog cat" print(s.replace("cat", "kitten"))	import std.stdio; import std.array; // replace() void main() { string s = "cat dog cat"; writeln(s.replace("cat", "kitten")); }

Output:

kitten dog kitten

(3) `startsWith()`, `endsWith()`
def main(): url = "https://dlang.org" print(url.startswith("https")) # True print(url.endswith(".com")) # False	import std.stdio; import std.algorithm.searching; // from here void main() { string url = "https://dlang.org"; writeln(url.startsWith("https")); // true writeln(url.endsWith(".com")); // false }

(4) `indexOf()`
def main(): s = "joker" print(s.find("k")) # 2 print(s.find("ke")) # 2 print(s.find("xxx")) # -1 idx = s.find("ke") # 2	import std.stdio; import std.string; // from here void main() { string s = "joker"; writeln(s.indexOf("k")); // 2 writeln(s.indexOf("ke")); // 2 writeln(s.indexOf("xxx")); // -1 int idx = cast(int) s.indexOf("ke"); // convert to int writeln(idx); // 2 }
	The return type of `indexOf()` is actually `ptrdiff_t` .

There's also lastIndexOf() that searches for the last occurrence of a character/substring in a string.