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What is the difference between square brackets and parentheses in a regex?
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These regexes are equivalent (for matching purposes):
/^(7|8|9)\d{9}$/
/^[789]\d{9}$/
/^[7-9]\d{9}$/
The explanation:
(a|b|c) is a regex "OR" and means "a or b or c", although the presence of brackets, necessary for the OR, also captures the digit. To be strictly equivalent, you...
Is there a way to measure how sorted a list is?
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answered Jun 8 '13 at 0:21
Timothy ShieldsTimothy Shields
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Python: changing value in a tuple
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184
First you need to ask, why you want to do this?
But it's possible via:
t = ('275', '54000', '...
How to install Java 8 on Mac
I want to do some programming with the latest JavaFX, which requires Java 8. I'm using IntelliJ 13 CE and Mac OS X 9 Mavericks. I ran Oracle's Java 8 installer, and the files look like they ended up at
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Differences between Java 8 Date Time API (java.time) and Joda-Time
...d a thread about the differences between the java.time API (new in Java 8 , defined by JSR 310 ) and Joda-Time .
3 Ans...
Java 8 functional interface with no arguments and no return value
What is the Java 8 functional interface for a method that takes nothing and returns nothing?
3 Answers
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How do I create a list of random numbers without duplicates?
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185
This will return a list of 10 numbers selected from the range 0 to 99, without duplicates.
imp...
Adjusting Eclipse console size
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0xCursor
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answered Apr 8 '10 at 14:29
MelMel
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“Unicode Error ”unicodeescape" codec can't decode bytes… Cannot open text files in Python 3 [duplica
..., on a windows 7 machines. Russian is the default system language, and utf-8 is the default encoding.
10 Answers
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Where should Rails 3 custom validators be stored?
...w if there's some gem/config you need to add for this, but under rails 3.2.8 this doesn't work. Specifically, simply dropping your validator into app/validators/???.rb doesn't work.
– Doug
Aug 28 '12 at 6:22
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