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Most efficient way to prepend a value to an array
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498
I'm not sure about more efficient in terms of big-O but certainly using the unshift method is ...
Why do we use arrays instead of other data structures?
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4 Answers
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Active
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HTTP 404 Page Not Found in Web Api hosted in IIS 7.5
...gging dev server. But I now deployed it to IIS 7.5 and I am getting a HTTP 404 error when trying to access the application.
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How do I remove duplicate items from an array in Perl?
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You can do something like this as demonstrated in perlfaq4:
sub uniq {
my %seen;
grep !$seen{$_}++, @_;
}
my @array = qw(one two three two three);
my @filtered = uniq(@array);
print "@filtered\n";
Outputs:
one two three
If you want to use a module, try the uniq func...
Scala how can I count the number of occurrences in a list
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4
It is the identity function, as discussed here. The function groupBy requires a function that it applies to elements so it knows how to grou...
Double vs single quotes
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204
" " allows you to do string interpolation, e.g.:
world_type = 'Mars'
"Hello #{world_type}"
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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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How to auto-remove trailing whitespace in Eclipse?
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14 Answers
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Is null an Object?
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edited Apr 17 '17 at 13:24
answered Dec 12 '09 at 18:28
Mi...
Why prefer two's complement over sign-and-magnitude for signed numbers?
...enting numbers, they would be 0010 and 1001, respectively (I'm sticking to 4 bits for size). In the two's complement way, they are 0010 and 1111. Now, let's say I want to add them.
Two's complement addition is very simple. You add numbers normally and any carry bit at the end is discarded. So they'...