Tutorial by Topics: functions

Functions in JavaScript provide organized, reusable code to perform a set of actions. Functions simplify the coding process, prevent redundant logic, and make code easier to follow. This topic describes the declaration and utilization of functions, arguments, parameters, return statements and scope ...

Functions in Python provide organized, reusable and modular code to perform a set of specific actions. Functions simplify the coding process, prevent redundant logic, and make the code easier to follow. This topic describes the declaration and utilization of functions in Python. Python has many bui...

Functions in Go provide organized, reusable code to perform a set of actions. Functions simplify the coding process, prevent redundant logic, and make code easier to follow. This topic describes the declaration and utilization of functions, arguments, parameters, return statements and scopes in Go. ...

Define a function with the function keyword: function f { } Define a function with (): f(){ } Define a function with both the function keyword and (): function f(){ }

Scala has first-class functions. Difference between functions and methods: A function is not a method in Scala: functions are a value, and may be assigned as such. Methods (created using def), on the other hand, must belong to a class, trait or object. Functions are compiled to a class exte...

As more secure web services avoid storing passwords in plain text format, languages such as PHP provide various (undecryptable) hash functions to support the more secure industry standard. This topic provides documentation for proper hashing with PHP. string password_hash ( string $password , ...

async and await build on top of promises and generators to express asynchronous actions inline. This makes asynchronous or callback code much easier to maintain. Functions with the async keyword return a Promise, and can be called with that syntax. Inside an async function the await keyword can be...

Function([DISTINCT] expression) -DISTINCT is an optional parameter AVG ( [ ALL | DISTINCT ] expression ) COUNT( { [ALL | DISTINCT ] expression ] | * } ) GROUPING(<column_expression>) MAX ( [ ALL | DISTINCT ] expression ) MIN ( [ ALL | DISTINCT ] expression ) SUM ( [ ALL | DISTINCT ] e...

Function functionName(argumentVariable As dataType, argumentVariable2 As dataType, Optional argumentVariable3 As dataType) As functionReturnDataType Basic declaration of a function. Every function needs a name, but it does not have to take any arguments. It may take 0 arguments, or it may take ...

Functions and subroutines, in conjunction with modules, are the tools to break down a program into units. This makes the program more readable and manageable. Each one of these units can be thought of as part of the code that, ideally, could be compiled and tested in isolation. The main program(s...

String functions perform operations on string values and return either numeric or string values. Using string functions, you can, for example, combine data, extract a substring, compare strings, or convert a string to all uppercase or lowercase characters. CONCAT ( string_value1, string_value...

funcname = function(paramA, paramB, ...) body; return exprlist end -- a simple function function funcname(paramA, paramB, ...) body; return exprlist end -- shorthand for above local funcname = function(paramA, paramB, ...) body; return exprlist end -- a lambda local funcname; funcname = functio...

Help text can be located before or after the function line, as long as there is not code between the function line and the start of the help text. Capitalization of the function name only bolds the name, and is not required. If a line is prepended with See also, any names on the line that mat...

(function name) ; retrieves the function object of that name #'name ; syntactic sugar for (function name) (symbol-function symbol) ; returns the function bound to symbol (funcall function args...) ; call function with args (apply function arglist) ; call function with arguments given in a list...

fun Name(Params) = ... fun Name(Params) {...} fun Name(Params): Type {...} fun <Type Argument> Name(Params): Type {...} inline fun Name(Params): Type {...} { ArgName: ArgType -> ... } { ArgName -> ... } { ArgNames -> ... } { (ArgName: ArgType): Type -> ... } Paramet...

Constructor functions are actually just regular functions, there's nothing special about them. It's only the new keyword which causes the special behavior shown in the examples above. Constructor functions can still be called like a regular function if desired, in which case you would need to bind...

ParameterDetailsRETURNSSpecifies the data type that can be returned from a function.RETURNActual variable or value following the RETURN syntax is what is returned to where the function was called from. A stored routine is either a procedure or a function. A procedure is invoked using a CALL st...