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If the range of a function does not cover the entire space corresponding to the data type of the function's return value, a value known to be impossible under normal computation can be used. For example, consider the function index, which takes a string and a substring, and returns the integer index of the substring in the main string. If the ...
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.
The complexity function of a disjunctive sequence S over an alphabet of size k is p S (n) = k n. [1] Any normal sequence (a sequence in which each string of equal length appears with equal frequency) is disjunctive, but the converse is not true. For example, letting 0 n denote the string of length n consisting of all 0s, consider the sequence
The #ifeq function selects one of two alternatives based on whether two test strings are equal to each other. {{#ifeq: string 1 | string 2 | value if equal | value if not equal}} If both strings are valid numerical values, they are compared as numbers, rather than as literal strings: {{#ifeq: 01 | 1 | equal | not equal }} → equal
PHP has hundreds of base functions and thousands more from extensions. Prior to PHP version 5.3.0, functions are not first-class functions and can only be referenced by their name, whereas PHP 5.3.0 introduces closures. [35] User-defined functions can be created at any time and without being prototyped. [35]
String 'prime' is returned for a Prime integer. Z ← (0 = (⍳ R) | R) / ⍳ R ⍝ Determine all factors for integer R, store into Z Z ← (~ (Z ∊ 1, R)) / Z ⍝ Delete 1 and the number as factors for the number from Z. → (0 =⍴ Z) / ProveNonPrimeIsPrime ⍝ If result has zero shape, it has no other factors and is therefore prime Z ← R ...
A string is a substring (or factor) [1] of a string if there exists two strings and such that =.In particular, the empty string is a substring of every string. Example: The string = ana is equal to substrings (and subsequences) of = banana at two different offsets:
EXTENDED MODE then F: Function Returns 1 if number is positive, 0 if it is 0, and −1 if it is negative [16] SIN: number: EXTENDED MODE then Q: Function Returns the sine of number [34] STEP: number: SYMBOL SHIFT+D: Other Indicates the interval used by a FOR statement, [44] for example FOR n = 2 TO 6 STEP 2 will skip n=3 and n=5 in the loop ...