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Writing a Python list of lists to a csv file
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312
Python's built-in CSV module can handle this easily:
import csv
with open("output.csv", "wb"...
How can I print the contents of a hash in Perl?
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Data::Dumper is your friend.
use Data::Dumper;
my %hash = ('abc' => 123, 'def' => [4,5,6]);
print Dumper(\%hash);
will output
$VAR1 = {
'def' => [
4,
5,
6
],
'abc' => 123
};...
Select count(*) from multiple tables
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337
SELECT (
SELECT COUNT(*)
FROM tab1
) AS count1,
(
S...
How to use base class's constructors and assignment operator in C++?
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answered Aug 4 '09 at 11:32
MottiMotti
95.3k4242 gold badges176176 silver badges242242 bronze badges
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Different bash prompt for different vi editing mode?
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Fresh bash 4.3 and readline 6.3 have something for you guys.. from the changelog:
4. New Features in Readline
j. New user-settable variable, show-mode-in-prompt, adds a characters to the
beginning of the prompt indicating the curre...
Java lib or app to convert CSV to XML file? [closed]
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edited Feb 7 '13 at 10:36
CloudyMarble
33.8k2323 gold badges8989 silver badges126126 bronze badges
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Reordering arrays
...splice(to, 0, this.splice(from, 1)[0]);
};
Then just use:
var ar = [1,2,3,4,5];
ar.move(0,3);
alert(ar) // 2,3,4,1,5
Diagram:
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How do I format a string using a dictionary in python-3.x?
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23
Since the question is specific to Python 3, here's using the new f-string syntax, available sinc...
How to wait for all goroutines to finish without using time.Sleep?
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answered Aug 13 '13 at 11:25
zzzzzzzz
67.5k1414 gold badges154154 silver badges127127 bronze badges
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How to get the Power of some Integer in Swift language?
...(radix), Double(power)))
}
// ...
// Then you can do this...
let i = 2 ^^ 3
// ... or
println("2³ = \(2 ^^ 3)") // Prints 2³ = 8
I used two carets so you can still use the XOR operator.
Update for Swift 3
In Swift 3 the "magic number" precedence is replaced by precedencegroups:
precedencegro...