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RegEx – ultimate deck
0.03MB. 0 audio & 0 images. Updated 2020-01-24.
The author has shared 11 other
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Description
Sample (from 143 notes)
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| Front | Vertical whitespace character |
| Syntax (back) | \v |
| Description (back) | Matches newlines and vertical tabs. Works with Unicode. Vertical tabs can be inserted in some word processors using CMD/CTRL+ENTER. |
| Example code (back) | /(\v)/ |
| Example matching (back) | line one line two |
| Tags | metasequence regex |
| Front | Regex engine modifier = NO_START_OPT |
| Syntax (back) | (*NO_START_OPT) |
| Description (back) | Before even attempting a match, the regex engine makes some checks, such as the length of the string. If it is not long enough to fit the pattern, it will automatically return a no match. This optimization can be disabled by using this modifier. |
| Example code (back) | |
| Example matching (back) | |
| Tags | groupconstruct regex regexenginemodifier |
| Front | Regex engine modifier = NO_AUTO_POSSESS |
| Syntax (back) | (*NO_AUTO_POSSESS) |
| Description (back) | The PCRE regex engine automatically applies some internal optimizations to regexes to avoid unnecessary backtracking. This modifier will disable that behavior, and thus the engine will backtrack until the previously matching instruction fails to do so. |
| Example code (back) | |
| Example matching (back) | |
| Tags | groupconstruct regex regexenginemodifier |
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Reviews
on
Really helpful! I wouldn't have approached RegEx without this.
on
Thanks
on
Absolutely terrific. Comprehensive and well explained with detailed examples.
on
This deck is very well put together, and super helpful for learning regex!
Comment from author
Great, I'm happy to hear that!
on
Pretty thorough deck!
on
Saved me the time of making my own cards! Nicely sorted into tags so that I can choose which cards I want.
on
This is a really well-made deck not only because it is so comprehensive, but even more so because it comes with examples and explanations. These make learning much easier and faster. I only need the basics, which are easy to identify because they are tagged: commontoken.