Function stoi not declared?

I'm trying to use stoi to convert a string to an integer, however it says it's not declared. I have the standard lib...

How do I check if a string contains another string in Swift??

In Objective-C the code to check for a substring in an NSString is: NSString *string = @"hello Swift"; NSRange tex...

How can I check if a string represents an int, without using try/except??

Is there any way to tell whether a string represents an integer (e.g., '3', '-17' but not '3.14' or 'asfasfas') With...

Check if URL has certain string with PHP?

I would like to know if some word is present in the URL. For example, if word car is in the URL, like www.domain.co...

Multiline string literal in C#?

Is there an easy way to create a multiline string literal in C#? Here's what I have now: string query = "SELECT fo...

C# equivalent to Java's charAt()??

I know we can use the charAt() method in Java get an individual character in a string by specifying its position. Is...

How can I get the last 7 characters of a PHP string??

How would I go about grabbing the last 7 characters of the string below? For example: $dynamicstring = "2490slkj40...

How to do case insensitive string comparison??

How do I perform case insensitive string comparison in JavaScript? ...

warning: 'characters' is deprecated: Please use String or Substring directly?

characters - an instance property of String, is deprecated from with Xcode 9.1 It was very useful to get a substrin...

warning: 'characters' is deprecated: Please use String or Substring directly?

characters - an instance property of String, is deprecated from with Xcode 9.1 It was very useful to get a substrin...

OCaml - How do I convert int to string??

How do I convert an int to a string? Example: 1 to "1". ...

How to change string into QString??

What is the most basic way to do it? ...

Ruby: How to convert a string to boolean?

I have a value that will be one of four things: boolean true, boolean false, the string "true", or the string "false...

Replace spaces with dashes and make all letters lower-case?

I need to reformat a string using jQuery or vanilla JavaScript Let’s say we have "Sonic Free Games". I want to c...