An Exploratory Study of Analyzing JavaScript Online Code Clones

2022 IEEE/ACM 30th International Conference on Program Comprehension (ICPC) Pub Date : 2022-05-01 DOI:10.1145/3524610.3528390

Md Rakib Hossain Misu, A. Satter

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Abstract

Online code clones occur due to reusing code snippets in software repositories from online resources such as GitHub and Stack Overflow. Previous works have shown that snippets from Stack Overflow are reused in other open-source projects and vice versa. Analysis of online code reusing patterns could identify outdated code, understand developers' practices, and help to design new code search engines. This study analyzed JavaScript online code clones between Stack Overflow and GitHub repositories. We first developed a JavaScript code corpus to search online clones. The clone search results reported 12,579 online clones between 276,547 non-trivial syntactically validated Stack Overflow snippets and 292 GitHub repositories. We manually classified the top 10% (1257) pairs of clones in seven online clone patterns. We observed that around 70% of JavaScript snippets in Stack Overflow posts are copied from GitHub repositories or from other external sources. Moreover, only 30.59% of JavaScript Snippets in Stack Overflow accepted answers could be considered as reusable snippets.

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JavaScript在线代码克隆分析的探索性研究

在线代码克隆是由于重用来自在线资源(如GitHub和Stack Overflow)的软件存储库中的代码片段而发生的。以前的工作表明Stack Overflow的代码片段可以在其他开源项目中重用，反之亦然。分析在线代码重用模式可以识别过时的代码，了解开发人员的实践，并帮助设计新的代码搜索引擎。这项研究分析了Stack Overflow和GitHub存储库之间的JavaScript在线代码克隆。我们首先开发了一个JavaScript代码语料库来搜索在线克隆。克隆搜索结果报告了276,547个非平凡语法验证的Stack Overflow片段和292个GitHub存储库之间的12,579个在线克隆。我们在7种在线克隆模式中对排名前10%(1257对)的克隆进行了人工分类。我们观察到Stack Overflow帖子中大约70%的JavaScript代码片段是从GitHub存储库或其他外部来源复制的。此外，Stack Overflow中只有30.59%的JavaScript snippet可以被认为是可重用的snippet。

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2022 IEEE/ACM 30th International Conference on Program Comprehension (ICPC)

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