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A rewrite in computer programming is the act or result of re-implementing a large portion of existing functionality without re-use of its source code or writing inscription. When the rewrite is not using existing code at all, it is common to speak of a rewrite from scratch. When instead only parts are re-engineered, which have otherwise become complicated to handle or extend, then it is more precise to speak of code refactoring. ==Motivations== A piece of software is typically rewritten when one or more of the following apply: *its source code is not available or is only available under an incompatible license *its code cannot be adapted to a new target platform *its existing code has become too difficult to handle and extend *the task of debugging it seems too complicated *the programmer finds it difficult to understand its source code *developers learn new techniques or wish to do a big feature overhaul which requires much change *developers learn that new codes written may extend content options that can fix or overwrite previous problems *the language of the source code has to be changed 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rewrite (programming)」の詳細全文を読む スポンサード リンク
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