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Which regular expression operator means 'Don't' match this character?
...) will match anything but word characters; similarly, [\d] will match the 0-9 digits while [\D] matches anything but the 0-9 digits, and so on.
If you use PHP you can take a look at the regex character classes documentation.
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When should I use @classmethod and when def method(self)?
...
70
Your guess is correct - you understand how classmethods work.
The why is that these methods can...
How do I get the name of captured groups in a C# Regex?
...oupName in regex.GetGroupNames())
{
Console.WriteLine(
"Group: {0}, Value: {1}",
groupName,
groups[groupName].Value);
}
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How to get last inserted row ID from WordPress database?
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answered Oct 16 '09 at 2:04
jsnfwlrjsnfwlr
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Prevent row names to be written to file when using write.csv
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answered Sep 20 '11 at 11:26
NPENPE
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How should I escape commas and speech marks in CSV files so they work in Excel?
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answered Sep 18 '12 at 8:50
centralscrucentralscru
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PHP regular expressions: No ending delimiter '^' found in
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PHP regex strings need delimiters. Try:
$numpattern="/^([0-9]+)$/";
Also, note that you have a lower case o, not a zero. In addition, if you're just validating, you don't need the capturing group, and can simplify the regex to /^\d+$/.
Example: http://ideone.com/Ec3zh
See also:...
What does it mean in shell when we put a command inside dollar sign and parentheses: $(command)
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– Jonathan Leffler
Aug 1 '13 at 4:03
7
Technically, $(echo foo) creates a command substitution,...
Count, size, length…too many choices in Ruby?
...static VALUE
rb_ary_count(int argc, VALUE *argv, VALUE ary)
{
long n = 0;
if (argc == 0) {
VALUE *p, *pend;
if (!rb_block_given_p())
return LONG2NUM(RARRAY_LEN(ary));
// etc..
}
}
The code for array.count does a few extra checks but in the end cal...