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  2. Go (programming language) - Wikipedia

    en.wikipedia.org/wiki/Go_(programming_language)

    For a pair of types K, V, the type map[K]V is the type mapping type-K keys to type-V values, though Go Programming Language specification does not give any performance guarantees or implementation requirements for map types. Hash tables are built into the language, with special syntax and built-in functions.

  3. Associative array - Wikipedia

    en.wikipedia.org/wiki/Associative_array

    This is most commonly implemented in the underlying object model, like .Net or Cocoa, which includes standard functions that convert the internal data into text. The program can create a complete text representation of any group of objects by calling these methods, which are almost always already implemented in the base associative array class ...

  4. Safe navigation operator - Wikipedia

    en.wikipedia.org/wiki/Safe_navigation_operator

    In object-oriented programming, the safe navigation operator (also known as optional chaining operator, safe call operator, null-conditional operator, null-propagation operator) is a binary operator that returns null if its first argument is null; otherwise it performs a dereferencing operation as specified by the second argument (typically an ...

  5. JSONPath - Wikipedia

    en.wikipedia.org/wiki/JSONPath

    JSON Pointer [10] defines a string syntax for identifying a single value within a given JSON value of known structure. JSONiq [11] is a query and transformation language for JSON. XPath 3.1 [12] is an expression language that allows the processing of values conforming to the XDM [13] data model. The version 3.1 of XPath supports JSON as well as ...

  6. GeoJSON - Wikipedia

    en.wikipedia.org/wiki/GeoJSON

    GeoJSON [1] is an open standard format designed for representing simple geographical features, along with their non-spatial attributes.It is based on the JSON format.. The features include points (therefore addresses and locations), line strings (therefore streets, highways and boundaries), polygons (countries, provinces, tracts of land), and multi-part collections of these types.

  7. Comparison of programming languages (array) - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_programming...

    name'Length: name'First: name'Last: ALGOL 68: UPB name - LWB name+1 2 UPB name - 2 LWB name+1 etc. LWB name 2 LWB name etc. UPB name. 2 UPB name etc. APL ⍴ name (⍴ name)[index] ⎕IO (⍴ name)-~⎕IO (⍴ name)[index]-~⎕IO: AWK: length: 1: asorti: C#, Visual Basic (.NET), Windows PowerShell, F#: name.Length: name.GetLowerBound(dimension ...

  8. Foreign function interface - Wikipedia

    en.wikipedia.org/wiki/Foreign_function_interface

    In JNI, for example, C code which "holds on to" object references that it receives from Java must communicate this information successfully to the Java virtual machine or Java Runtime Environment (JRE), otherwise, Java may delete objects before C finishes with them. (The C code must also explicitly release its link to any such object once C has ...

  9. Comparison of data-serialization formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_data...

    UTF-8-encoded, preceded by 32-bit integer length of string in bytes Vectors of any other type, preceded by 32-bit integer length of number of elements Tables (schema defined types) or Vectors sorted by key (maps / dictionaries) Ion [18] \x0f [b]