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snippets/python/s/kebab.md

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+---
+title: Kebabcase string
+type: snippet
+language: python
+tags: [string,regexp]
+cover: mask-quiet
+dateModified: 2020-11-02T19:28:05+02:00
+---
+
+Converts a string to kebab case.
+
+- Use `re.sub()` to replace any `-` or `_` with a space, using the regexp `r"(_|-)+"`.
+- Use `re.sub()` to match all words in the string, `str.lower()` to lowercase them.
+- Finally, use `str.join()` to combine all word using `-` as the separator.
+
+```py
+from re import sub
+
+def kebab(s):
+  return '-'.join(
+    sub(r"(\s|_|-)+"," ",
+    sub(r"[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+",
+    lambda mo: ' ' + mo.group(0).lower(), s)).split())
+```
+
+```py
+kebab('camelCase') # 'camel-case'
+kebab('some text') # 'some-text'
+kebab('some-mixed_string With spaces_underscores-and-hyphens')
+# 'some-mixed-string-with-spaces-underscores-and-hyphens'
+kebab('AllThe-small Things') # 'all-the-small-things'
+```