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emacs/elisp: What is the hash (pound, number sign, octothorp) symbol used for?
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101
There is no difference:
(eq 'my-add #'my-add)
yields t
The # can be used in front of a lamb...
Use NUnit Assert.Throws method or ExpectedException attribute?
...actice?
– SamuelDavis
Feb 22 '13 at 0:03
5
@SamuelDavis - in general you wouldn't want to test di...
Why use Dijkstra's Algorithm if Breadth First Search (BFS) can do the same thing faster?
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edited Nov 10 '11 at 9:11
answered Sep 29 '10 at 0:58
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python dataframe pandas drop column using int
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edited Feb 16 '16 at 10:48
frederikf
333 bronze badges
answered Nov 30 '13 at 15:06
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What does template mean?
...Factorial<N - 1>::value };
};
template <>
struct Factorial<0>
{
enum { value = 1 };
};
// Factorial<4>::value == 24
// Factorial<0>::value == 1
void foo()
{
int x = Factorial<4>::value; // == 24
int y = Factorial<0>::value; // == 1
}
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Insert ellipsis (…) into HTML tag if content too wide
...line {
white-space: normal;
}
<div class="ellipsis" style="width: 100px; border: 1px solid black;">Lorem ipsum dolor sit amet, consectetur adipisicing elit</div>
<div class="ellipsis multiline" style="width: 100px; height: 40px; border: 1px solid black; margin-bottom: 100px">L...
Fixed point vs Floating point number
...d represent would be 99999.99999 and the smallest non-zero number would be 00000.00001. Every bit of code that processes such numbers has to have built-in knowledge of where the decimal point is.
A floating point number does not reserve a specific number of bits for the integer part or the fraction...
Enums and Constants. Which to use when?
...rom here as I'm lazy)
[FlagsAttribute]
enum DistributedChannel
{
None = 0,
Transacted = 1,
Queued = 2,
Encrypted = 4,
Persisted = 16,
FaultTolerant = Transacted | Queued | Persisted
}
Constants should be for a single value, like PI. There isn't a range of PI values, there is just PI.
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Iterate over object keys in node.js
...matter.
var async = {};
async.forEach = function(o, cb) {
var counter = 0,
keys = Object.keys(o),
len = keys.length;
var next = function() {
if (counter < len) cb(o[keys[counter++]], next);
};
next();
};
async.forEach(obj, function(val, next) {
// do things
setTimeout(ne...
How do I convert an interval into a number of hours with postgres?
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Probably the easiest way is:
SELECT EXTRACT(epoch FROM my_interval)/3600
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