# How to find and replace (Regx) in string abcdac only 'a' who is not before 'c'?

**URL:** <https://discourse.julialang.org/t/how-to-find-and-replace-regx-in-string-abcdac-only-a-who-is-not-before-c/45354>\
**Category:** General Usage\
**Created:** [August 22, 2020, 8:41am UTC](https://discourse.julialang.org/t/how-to-find-and-replace-regx-in-string-abcdac-only-a-who-is-not-before-c/45354 "2020-08-22T08:41:13Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![tlienart](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tlienart/32/7640_2.png) [@tlienart](https://discourse.julialang.org/u/tlienart)\
**Post date:** [August 22, 2020, 10:11am UTC](https://discourse.julialang.org/t/how-to-find-and-replace-regx-in-string-abcdac-only-a-who-is-not-before-c/45354/3 "2020-08-22T10:11:45Z")

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If the issue is with finding the proper regex, [regex101.com](http://regex101.com) is usually an invaluable resource.

Also: [[ANN] ReadableRegex.jl](https://discourse.julialang.org/t/ann-readableregex-jl/43450) might help

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