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Regex how to match an optional character

...StefanStefan 41.5k99 gold badges7070 silver badges115115 bronze badges 1 ...
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Why are variables “i” and “j” used for counters?

...rtran II.) – S.Lott Nov 9 '10 at 19:51 5 ...
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Waiting on a list of Future

.../gs/async-method – maaw Apr 22 at 2:51 Works as expected. – Dimon May 5 at 17:3...
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Getting the first character of a string with $str[0]

... Alexis Wilke 14.2k77 gold badges5151 silver badges9898 bronze badges answered Dec 28 '09 at 23:31 HockHock 5,4...
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install / uninstall APKs programmatically (PackageManager vs Intents)

... – Rahul Mandaliya Nov 18 '14 at 13:51  |  show 2 more comme...
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How to ignore xargs commands if stdin input is empty?

... arielCoarielCo 37633 silver badges1515 bronze badges 2 ...
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Rails: where does the infamous “current_user” come from?

... answered Oct 4 '12 at 3:51 Zach KempZach Kemp 10.9k11 gold badge2626 silver badges4242 bronze badges ...
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What is the Ruby (spaceship) operator?

..."... – Elmar Zander Sep 23 '19 at 5:51 ...
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Can I change all my http:// links to just //?

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Understanding the basics of Git and GitHub [closed]

... | edited Apr 9 '14 at 6:51 interestinglythere 75888 silver badges1313 bronze badges answered Aug 5 '12...