How to know if a given string is substring from another string in Java
There is a contains() method! It was introduced in Java 1.5. If you are using an earlier version, then it’s easy to replace it with this:
substring
How do I get the last character of a string?
The code: The output of java Test abcdef:
warning: ‘characters’ is deprecated: Please use String or Substring directly
Swift 4 introduced changes on string API.You can just use !stringValue.isEmpty instead of stringValue.characters.count > 0 for more information you get the sample from here for e.g
Remove last character from C++ string
For a non-mutating version:
What is the difference between String.slice and String.substring?
slice() works like substring() with a few different behaviors. What they have in common: If start equals stop: returns an empty string If stop is omitted: extracts characters to the end of the string If either argument is greater than the string’s length, the string’s length will be used instead. Distinctions of substring(): If start > stop, then substring will swap those 2 arguments. If either argument … Read more
Substring index and length must refer to a location within the string
The second parameter in Substring is the length of the substring, not the end index. You should probably include handling to check that it does indeed start with what you expect, end with what you expect, and is at least as long as you expect. And then if it doesn’t match, you can either do something else … Read more
Fastest way to remove first char in a String
The second option really isn’t the same as the others – if the string is “///foo” it will become “foo” instead of “//foo”. The first option needs a bit more work to understand than the third – I would view the Substring option as the most common and readable. (Obviously each of them as an individual statement … Read more
How do I check if a C++ std::string starts with a certain string, and convert a substring to an int?
Use rfind overload that takes the search position pos parameter, and pass zero for it: Who needs anything else? Pure STL! Many have misread this to mean “search backwards through the whole string looking for the prefix”. That would give the wrong result (e.g. string(“tititito”).rfind(“titi”) returns 2 so when compared against == 0 would return false) and it would be inefficient (looking through … Read more
How to replace a substring of a string
You need to use return value of replaceAll() method. replaceAll() does not replace the characters in the current string, it returns a new string with replacement. String objects are immutable, their values cannot be changed after they are created. You may use replace() instead of replaceAll() if you don’t need regex. outputs