---
title: "正規表現(Regular Expression) - Reviews, Revenue and Downloads in Japan | Apple App Store"
description: "正規表現とは、『メタ文字(文字の情報、つまり"0"なら数字、"a"なら半角英字など)を利用して、文字列を表現すること』です。 １つメタ文字を紹介すると、"."(ドット)は『なんでも良い１文字』です。 例えば、正規表現『あ.す』に一致する文字は 『あいす』、『あきす』や『あーす』などなど...。  メタ文字を複数組み合わせることで膨大な文章の中から、電話番号のみなどの、特定の文字列だけ検索することが"
---

# 正規表現(Regular Expression) — Japan
> 正規表現のためのアプリ

![正規表現(Regular Expression) App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple112/v4/0b/88/7f/0b887fa7-1985-4d60-66d4-d2fb8e2037f2/AppIcon-1x_U007emarketing-0-5-0-85-220.png/434x0w.png)

**Developer:** [Hiroki Sato](https://apptail.io/developer/hiroki-sato-DWAb)
**Category:** Education
**Rating:** 4.4/5 (9 ratings)
**Price:** Free
**Bundle ID:** hiroki.sato.RexEx
**Store:** Apple App Store
**Country:** Japan
**Version:** 1.3 (released 2022-04-24)
**Original Release:** 2020-09-02
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/jp/app/app/id1529795657)
**AppTail Page:** [https://apptail.io/app/regular-expression-Nnhd/japan](https://apptail.io/app/regular-expression-Nnhd/japan)

## 正規表現(Regular Expression) Description
正規表現とは、『メタ文字(文字の情報、つまり"0"なら数字、"a"なら半角英字など)を利用して、文字列を表現すること』です。
１つメタ文字を紹介すると、"."(ドット)は『なんでも良い１文字』です。
例えば、正規表現『あ.す』に一致する文字は
『あいす』、『あきす』や『あーす』などなど...。

メタ文字を複数組み合わせることで膨大な文章の中から、電話番号のみなどの、特定の文字列だけ検索することが容易になります。

正規表現を覚えるために３つの機能を用意しています。
①基本的な正規表現の一覧機能
→メタ文字の使い方や、正規表現(メタ文字の組み合わせ)の一覧が閲覧可能です。
②正規表現を学ぶための機能
→難易度別に問題を用意しました。４択形式です。
全部回答すると、選択肢ごとに振り返りもできるようにしています。
合計で80問程度作りましたが、今後増やしていこうと思っています。(ネタを提供していただけると幸いです。)

③自由に正規表現を確認する機能
→自由に正規表現を確認できる画面を用意しています。
正規表現の入力補助機能や、フラグによる正規表現もあります。

※『おいおい、正規表現の使い方間違っているぞ!!』、『この正規表現しってると便利だぞ!!』などありましたら、お手数ですがご連絡いただけると幸いですm(_ _)m※

## 正規表現(Regular Expression) Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource114/v4/3f/81/4a/3f814a54-cb4a-3bde-cfa5-e5a282d36cc8/dac8d5a1-2735-41c8-9cb0-3558c42f054f_RegEx_iPhone11_U7528_U30b9_U30af_U30b7_U30e7.001.jpeg/1242x2688.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource124/v4/c5/e2/06/c5e206d9-e8f4-30ee-50bd-fdde2af28caa/70b7b84d-32d2-46e7-8733-5decdce740c4_RegEx_iPhone11_U7528_U30b9_U30af_U30b7_U30e7.002.jpeg/1242x2688.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource124/v4/d9/b8/01/d9b801f3-64f2-7b80-6a29-5a8ea71d0601/e257e523-b5f1-48f7-bb10-7aaaed04cf6f_RegEx_iPhone11_U7528_U30b9_U30af_U30b7_U30e7.003.jpeg/1242x2688.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource114/v4/f3/c6/3a/f3c63ac3-b858-7440-8709-3de55fa990eb/4b705b0a-2e13-4401-aaf6-67849107c868_RegEx_iPhone11_U7528_U30b9_U30af_U30b7_U30e7.004.jpeg/1242x2688.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource114/v4/9c/d9/49/9cd94953-6221-9661-f684-084c9daa728a/ab1efb82-44df-4329-a0c9-458e3092f604_RegEx_iPhone11_U7528_U30b9_U30af_U30b7_U30e7.005.jpeg/1242x2688.png)

## 正規表現(Regular Expression) Rating Breakdown in Japan
- 5 stars: 6 (67%)
- 4 stars: 2 (22%)
- 3 stars: 0 (0%)
- 2 stars: 1 (11%)
- 1 stars: 0 (0%)




## 正規表現(Regular Expression) Discovered Keywords
- regularity


## 正規表現(Regular Expression) Available In
- [Japan](https://apptail.io/app/regular-expression-Nnhd/japan)
- [Argentina](https://apptail.io/app/regular-expression-Nnhd/argentina)
- [Austria](https://apptail.io/app/regular-expression-Nnhd/austria)
- [Australia](https://apptail.io/app/regular-expression-Nnhd/australia)
- [Azerbaijan](https://apptail.io/app/regular-expression-Nnhd/azerbaijan)
- [Belgium](https://apptail.io/app/regular-expression-Nnhd/belgium)
- [Brazil](https://apptail.io/app/regular-expression-Nnhd/brazil)
- [Belarus](https://apptail.io/app/regular-expression-Nnhd/belarus)
- [Canada](https://apptail.io/app/regular-expression-Nnhd/canada)
- [Switzerland](https://apptail.io/app/regular-expression-Nnhd/switzerland)
- [Chile](https://apptail.io/app/regular-expression-Nnhd/chile)
- [China](https://apptail.io/app/regular-expression-Nnhd/china)
- [Colombia](https://apptail.io/app/regular-expression-Nnhd/colombia)
- [Czechia](https://apptail.io/app/regular-expression-Nnhd/czechia)
- [Germany](https://apptail.io/app/regular-expression-Nnhd/germany)
- [Denmark](https://apptail.io/app/regular-expression-Nnhd/denmark)
- [Dominican Republic](https://apptail.io/app/regular-expression-Nnhd/dominican-republic)
- [Algeria](https://apptail.io/app/regular-expression-Nnhd/algeria)
- [Ecuador](https://apptail.io/app/regular-expression-Nnhd/ecuador)
- [Egypt](https://apptail.io/app/regular-expression-Nnhd/egypt)
- [Spain](https://apptail.io/app/regular-expression-Nnhd/spain)
- [Finland](https://apptail.io/app/regular-expression-Nnhd/finland)
- [France](https://apptail.io/app/regular-expression-Nnhd/france)
- [United Kingdom](https://apptail.io/app/regular-expression-Nnhd/united-kingdom)
- [Greece](https://apptail.io/app/regular-expression-Nnhd/greece)
- [Hong Kong SAR China](https://apptail.io/app/regular-expression-Nnhd/hong-kong)
- [Croatia](https://apptail.io/app/regular-expression-Nnhd/croatia)
- [Hungary](https://apptail.io/app/regular-expression-Nnhd/hungary)
- [Indonesia](https://apptail.io/app/regular-expression-Nnhd/indonesia)
- [Ireland](https://apptail.io/app/regular-expression-Nnhd/ireland)
- [Israel](https://apptail.io/app/regular-expression-Nnhd/israel)
- [India](https://apptail.io/app/regular-expression-Nnhd/india)
- [Iceland](https://apptail.io/app/regular-expression-Nnhd/iceland)
- [Italy](https://apptail.io/app/regular-expression-Nnhd/italy)
- [South Korea](https://apptail.io/app/regular-expression-Nnhd/south-korea)
- [Kuwait](https://apptail.io/app/regular-expression-Nnhd/kuwait)
- [Kazakhstan](https://apptail.io/app/regular-expression-Nnhd/kazakhstan)
- [Lebanon](https://apptail.io/app/regular-expression-Nnhd/lebanon)
- [Lithuania](https://apptail.io/app/regular-expression-Nnhd/lithuania)
- [Madagascar](https://apptail.io/app/regular-expression-Nnhd/madagascar)
- [North Macedonia](https://apptail.io/app/regular-expression-Nnhd/north-macedonia)
- [Malta](https://apptail.io/app/regular-expression-Nnhd/malta)
- [Mexico](https://apptail.io/app/regular-expression-Nnhd/mexico)
- [Malaysia](https://apptail.io/app/regular-expression-Nnhd/malaysia)
- [Nigeria](https://apptail.io/app/regular-expression-Nnhd/nigeria)
- [Netherlands](https://apptail.io/app/regular-expression-Nnhd/netherlands)
- [Norway](https://apptail.io/app/regular-expression-Nnhd/norway)
- [Nepal](https://apptail.io/app/regular-expression-Nnhd/nepal)
- [New Zealand](https://apptail.io/app/regular-expression-Nnhd/new-zealand)
- [Peru](https://apptail.io/app/regular-expression-Nnhd/peru)
- [Philippines](https://apptail.io/app/regular-expression-Nnhd/philippines)
- [Pakistan](https://apptail.io/app/regular-expression-Nnhd/pakistan)
- [Poland](https://apptail.io/app/regular-expression-Nnhd/poland)
- [Portugal](https://apptail.io/app/regular-expression-Nnhd/portugal)
- [Romania](https://apptail.io/app/regular-expression-Nnhd/romania)
- [Russia](https://apptail.io/app/regular-expression-Nnhd/russia)
- [Saudi Arabia](https://apptail.io/app/regular-expression-Nnhd/saudi-arabia)
- [Sweden](https://apptail.io/app/regular-expression-Nnhd/sweden)
- [Singapore](https://apptail.io/app/regular-expression-Nnhd/singapore)
- [Slovenia](https://apptail.io/app/regular-expression-Nnhd/slovenia)
- [Slovakia](https://apptail.io/app/regular-expression-Nnhd/slovakia)
- [Thailand](https://apptail.io/app/regular-expression-Nnhd/thailand)
- [Tunisia](https://apptail.io/app/regular-expression-Nnhd/tunisia)
- [Türkiye](https://apptail.io/app/regular-expression-Nnhd/turkey)
- [Taiwan](https://apptail.io/app/regular-expression-Nnhd/taiwan)
- [Ukraine](https://apptail.io/app/regular-expression-Nnhd/ukraine)
- [United States](https://apptail.io/app/regular-expression-Nnhd/united-states)
- [Uzbekistan](https://apptail.io/app/regular-expression-Nnhd/uzbekistan)
- [Vietnam](https://apptail.io/app/regular-expression-Nnhd/vietnam)
- [United Arab Emirates](https://apptail.io/app/regular-expression-Nnhd/united-arab-emirates)
- [South Africa](https://apptail.io/app/regular-expression-Nnhd/south-africa)

---

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