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String functions are used in computer programming languages to manipulate a string or query information about a string (some do both).. Most programming languages that have a string datatype will have some string functions although there may be other low-level ways within each language to handle strings directly.
COBOL uses the STRING statement to concatenate string variables. MATLAB and Octave use the syntax "[x y]" to concatenate x and y. Visual Basic and Visual Basic .NET can also use the "+" sign but at the risk of ambiguity if a string representing a number and a number are together. Microsoft Excel allows both "&" and the function "=CONCATENATE(X,Y)".
Implements template {{Str find word}}. This module looks for a word being present in a comma-separated list of words. It then returns a True or False value. By default, the True-value returned is the found word itself; the False-value is a blank string. For example, in the source string ' foo, bar ' the word ' bar ' appears, but the word ...
It is possible to check multiple words against the source wordlist. AND-words to check |andwords=: can have a wordlist (comma-separated as |source= is). Each word will be checked against the source. When all and-words are found, the return value is True. {{Str find word |source=alpha, beta, gamma, foo, bar |andwords=alpha, foo}} (True) → ...
Python. The use of the triple-quotes to comment-out lines of source, does not actually form a comment. [21] The enclosed text becomes a string literal, which Python usually ignores (except when it is the first statement in the body of a module, class or function; see docstring). Elixir
A simple and inefficient way to see where one string occurs inside another is to check at each index, one by one. First, we see if there is a copy of the needle starting at the first character of the haystack; if not, we look to see if there's a copy of the needle starting at the second character of the haystack, and so forth.
A classic example of a problem which a regular grammar cannot handle is the question of whether a given string contains correctly nested parentheses. (This is typically handled by a Chomsky Type 2 grammar, also termed a context-free grammar .)
It is possible to check multiple words against the source wordlist. AND-words to check |andwords=: can have a wordlist (comma-separated as |source= is). Each word will be checked against the source. When all and-words are found, the return value is True. {{Str find word |source=alpha, beta, gamma, foo, bar |andwords=alpha, foo}} (True) → ...