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jq (programming language)
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<p>jq is a <a href="/facts/Very_high-level_programming_language/tNKHpqRj">very high-level</a> <a href="/facts/Scope_(computer_science)/bbj6AFMo">lexically scoped</a> <a href="/facts/Functional_programming/cdxqPEIM">functional</a> <a href="/facts/Programming_language/cWTYbgWa">programming language</a> in which every <a href="/facts/JavaScript/XhhIIEsl">JavaScript</a> Object Notation (<a href="/facts/JSON/bs1rUAhd">JSON</a>) value is a constant. jq supports <a href="/facts/Backtracking/Jm9vDUk8">backtracking</a> and managing indefinitely long <a href="/facts/Stream_(computing)/2jtBAp0U">streams</a> of JSON data. It is related to two programming languages <a href="/facts/Icon_(programming_language)/J7QHUDqq">Icon</a> and <a href="/facts/Haskell/ydEsHuGy">Haskell</a>. The language supports a <a href="/facts/Namespace/9efXwMtV">namespace</a>-based <a href="/facts/Modular_programming/sNoqKvRD">module</a> system and has some support for <a href="/facts/Closure_(computer_programming)/droP22Xn">closures</a>. <a href="/facts/Function_(computer_programming)/9vFJrg0A">functions</a> and functional expressions can be used as parameters of other functions. </p><p>The original implementation of jq was in <a href="/facts/Haskell/ydEsHuGy">Haskell</a> before being quickly ported to <a href="/facts/C_(programming_language)/Ky2No763">C</a>. </p>