Programming idiom

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In programming and in code, an idiom describes a commonly-used way to code a relatively small construct in a particular programming context (i.e. programming language). Many such constructs are found in multiple programming contexts yet tend to vary by context. Like a linguistic idiom, a programming idiom is a commonly-used way to express a concept in a language that exists outside the definition of the language yet is constrained by it. Similar to a software design pattern, an idiom is a template to be followed, not code that can be copy-and-pasted into a codebase. In this sense, an idiom is a pattern, yet software design pattern is a classification reserved for significantly larger-scale functionality; usually involving the interaction of multiple objects. Using the idioms for a programming context (instead of using idiosyncratic constructs) helps a team work together since they lower the cognitive load of the resulting code. Such idiomatic use is common in crowdsourced repositories to help developers overcome programming barriers.