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Deleting lines from one file which are in another file
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answered Jan 24 '11 at 9:06
gabuzogabuzo
6,27833 gold badges2323 silver badges3535 bronze badges
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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:...
How to count items in a Go map?
...ed from the now-retired SO documentation:
m := map[string]int{}
len(m) // 0
m["foo"] = 1
len(m) // 1
If a variable points to a nil map, then len returns 0.
var m map[string]int
len(m) // 0
Excerpted from Maps - Counting map elements. The original author was Simone Carletti. Attribution det...
Matplotlib plots: removing axis, legends and white spaces
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406
I think that the command axis('off') takes care of one of the problems more succinctly than cha...
is node.js' console.log asynchronous?
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102
Update: Starting with Node 0.6 this post is obsolete, since stdout is synchronous now.
Well le...
Is it possible to figure out the parameter type and return type of a lambda?
..._traits implementation based on Specializing a template on a lambda in C++0x which can give the parameter types. The trick, as described in the answer in that question, is to use the decltype of the lambda's operator().
template <typename T>
struct function_traits
: public function_trai...
How to find out element position in slice?
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70
Sorry, there's no generic library function to do this. Go doesn't have a straight forward way of...
Booleans, conditional operators and autoboxing
...onditional expression is the result of applying capture conversion (§5.1.10) to lub(T1, T2) (§15.12.2.7).
S1 == <special null type> (see §4.1)
S2 == boolean
T1 == box(S1) == <special null type> (see last item in list of boxing conversions in §5.1.7)
T2 == box(S2) == `Boolean
lub(...
How do I space out the child elements of a StackPanel?
...ype="{x:Type TextBox}">
<Setter Property="Margin" Value="0,10,0,0"/>
</Style>
</StackPanel.Resources>
<TextBox Text="Apple"/>
<TextBox Text="Banana"/>
<TextBox Text="Cherry"/>
</StackPanel>
EDIT: In case you would wa...
Cancellation token in Task constructor: why?
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Eliahu Aaron
3,15122 gold badges2020 silver badges3232 bronze badges
answered Sep 14 '10 at 21:38
Max GalkinMax Galkin
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