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What's the easiest way to install a missing Perl module?
...ause you specify the distribution that you want to install, which is a lot more honest. For instance, if you use cpan to install LWP, LWP::Simple or LWP::UserAgent it will install the distribution libwww-perl for you. The majority of distributions contain a single module with an equivalent name, but...
What is a “web service” in plain English?
...ther programs can understand the output.
The full definition is obviously more complex but you asked for plain English.
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In Matplotlib, what does the argument mean in fig.add_subplot(111)?
...starts from 1 and increments row-first. See documentation of subplot() for more info.
– Christian Alis
Feb 2 '11 at 16:54
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Why do we need virtual functions in C++?
...rats. Should you overload func() so it takes a Cat*? If you have to derive more animals from Animal they would all need their own func().
The solution is to make eat() from the Animal class a virtual function:
class Animal
{
public:
virtual void eat() { std::cout << "I'm eating g...
Write lines of text to a file in R
...ike to add lines to the same file? (The issue being is that you can't have more then one connection to a file, If I am not mistaken) Thanks.
– Tal Galili
Mar 18 '10 at 15:02
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Grouping functions (tapply, by, aggregate) and the *apply family
...b c
1 3 91
sapply(x, FUN = sum)
a b c
1 6 5005
In more advanced uses of sapply it will attempt to coerce the
result to a multi-dimensional array, if appropriate. For example, if our function returns vectors of the same length, sapply will use them as columns of a matrix:
sa...
Multi-line string with extra space (preserved indentation)
...
Heredoc sounds more convenient for this purpose. It is used to send multiple commands to a command interpreter program like ex or cat
cat << EndOfMessage
This is line 1.
This is line 2.
Line 3.
EndOfMessage
The string after <&lt...
Why does Twitter Bootstrap Use Pixels for Font Size?
...ully coherent enough. I'll try to blog about these changes as they come up more, but I'm unsure how close 3.0 is and what that will all entail yet.
I would suggest anyone with strong feelings about this go and +1 this thread.
[Update] V3 roadmap oulined in V2.3 release blogpost makes no mention of ...
With arrays, why is it the case that a[5] == 5[a]?
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I wonder if it isn't more like *((5 * sizeof(a)) + a). Great explaination though.
– John MacIntyre
Dec 19 '08 at 17:06
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