Tutorial by Topics: ion

RAII stands for Resource Acquisition Is Initialization. Also occasionally referred to as SBRM (Scope-Based Resource Management) or RRID (Resource Release Is Destruction), RAII is an idiom used to tie resources to object lifetime. In C++, the destructor for an object always runs when an object goes...
The C language is traditionally a compiled language (as opposed to interpreted). The C Standard defines translation phases, and the product of applying them is a program image (or compiled program). In c11, the phases are listed in §5.1.1.2. Filename extensionDescription.cSource file. Usually ...
WITH cte_name [(column_name_1, column_name_2, ...)] AS (cte_expression) It is necessary to separate a CTE from the previous statement with a semi-colon (;) character. i.e. ;WITH CommonTableName (...) SELECT ... FROM CommonTableName ... A CTE's scope is a single batch, and only downstream ...
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...
See also I/O for geographic data
A set contains only one copy of each distinct element. Unlike some other programming languages, base R does not have a dedicated data type for sets. Instead, R treats a vector like a set by taking only its distinct elements. This applies to the set operators, setdiff, intersect, union, setequal an...
'() → () '(1 2 3 4 5) → (1 2 3 4 5) '(1 foo 2 bar 3) → (1 'foo 2 'bar 3) (list 1 2 3 4 5) → (1 2 3 4 5) (list* [1 2 3 4 5]) → (1 2 3 4 5) [] → [] [1 2 3 4 5] → [1 2 3 4 5] (vector 1 2 3 4 5) → [1 2 3 4 5] (vec '(1 2 3 4 5)) → [1 2 3 4 5] {} => {} {:keyA 1 :keyB 2} → {:keyA 1 :keyB 2} ...
TargetType target = (SourceType) source;
NameDescriptionASCII()Return numeric value of left-most characterBIN()Return a string containing binary representation of a numberBIT_LENGTH()Return length of argument in bitsCHAR()Return the character for each integer passedCHAR_LENGTH()Return number of characters in argumentCHARACTER_LENGTH()Syno...
In this topic you will learn how to integrate with Node.js using MYSQL database management tool. You will learn various ways to connect and interact with data residing in mysql using a nodejs program and script.

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