| Lines 11 - 28 |
Lines 11 - 39 |
| **Please note**: Like in the Yahoo Pipes discussions, I put RegEx patterns within square brackets. That way, you can distinguish for example [] and [ ] easily. Please omit the square brackets unless noted otherwise. |
**Please note**: Like in the Yahoo Pipes discussions, I put RegEx patterns within square brackets. That way, you can distinguish for example [] and [ ] easily. Please omit the square brackets unless noted otherwise. |
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| +++ The Checkboxes |
+++ The Modifiers |
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| What do the four checkboxes mean next to each RegEx line? The answer is taken from the [http://discuss.pipes.yahoo.com/Message_Boards_for_Pipes/threadview?bn=pip-DeveloperHelp&tid=3410&mid=3414 Yahoo Pipes Discussions]. |
You might have noticed four checkboxes next to each RegEx line. Those are used for modifying the way the RegEx behaves and succeeded the so called "embedded pattern-match modifiers". But they did not completely replace them. |
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In fact, you can use the modifiers "I, M, S and X" in embedded notation, while the checkboxes offer the options "I, M, S and G". So there's no X for checkboxes while there's no G for the embedded notification. |
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The answer is taken from the [http://discuss.pipes.yahoo.com/Message_Boards_for_Pipes/threadview?bn=pip-DeveloperHelp&tid=3410&mid=3414 Yahoo Pipes Discussions]. |
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**What they do** |
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| * **g** allow global matches. set=match every occurence; unset=match only first occurence. |
* **g** allow global matches. set=match every occurence; unset=match only first occurence. |
| * **i** be case insensitive. set='A' equals 'a'; unset 'A' and 'a' are treated differently |
* **i** be case insensitive. set='A' equals 'a'; unset 'A' and 'a' are treated differently |
| * **m** treat string as multiple lines. set='^' matches every start of string after a \n and/or \r . unset='^' matches only the very first character in the string. |
* **m** treat string as multiple lines. set='^' matches every start of string after a \n and/or \r . unset='^' matches only the very first character in the string. |
| * **s** allow '.' to match new lines as well. set='.' matches '\n'. unset='.' does not match '\n'. |
* **s** allow '.' to match new lines as well. set='.' matches '\n'. unset='.' does not match '\n'. |
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* **x** allow white spaces and comments within an expression. |
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**Embedded Notation** |
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[http://discuss.pipes.yahoo.com/Message_Boards_for_Pipes/threadview?m=te&bn=pip-DeveloperHelp&tid=4415&mid=4415&tof=131&frt=2#4415 Hapdaniel] from the Yahoo Pipes Discussions points out, the original form of specifying those flags is the "embedded notation". If you prefix your RegEx with a (?x), you'll set the X-modificator. You cannot set a (?g) that way, though. |
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| **Alternate Notation** |
**Checkbox Notation** |
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| [http://discuss.pipes.yahoo.com/Message_Boards_for_Pipes/threadview?m=te&bn=pip-DeveloperHelp&tid=4415&mid=4415&tof=131&frt=2#4415 Hapdaniel] from the Yahoo Pipes Discussions points out, that there is an alternate form of specifying those flags as well. you can for example prefix your RegEx with a (?g) to get the +g flag set. |
To activate one of the checkbox-flags, just tick it. You can tick as many flags as you like. Except the X-flag, which apparently is not available as checkbox. |
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| +++ Common patterns |
+++ Common patterns |
| Lines 96 - 104 |
Lines 107 - 126 |
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| Sometimes, you'd like to add something in front of a field. For example, to add a "Yahoo: " in front of every title, you could |
Sometimes, you'd like to add something in front of a field. For example, to add a "Yahoo: " in front of every title, you could |
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| * Replace [(.*)] with [Yahoo: $1] |
* Replace [^] with [Yahoo: $1] |
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$1 matches the first group used (we have only one group in this example). And ^ matches the beginning of the expression. |
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Source: |
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**Postfixing something** |
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And to suffix something, you'd use a $ instead of the ^. |
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* Replace [$] with [Yahoo: $1] |
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| $1 matches the first group used (we have only one group in this example). |
Source: |
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| **Translating dates** |
**Translating dates** |
YahooPipesRegex
