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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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Difference between onCreateView and onViewCreated in Fragment
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answered Aug 2 '16 at 10:40
AndroidGeekAndroidGeek
29.3k1111 gold badges197197 silver badges250250 bronze badges
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Comparing two byte arrays in .NET
...nt[] { 1, 2, 3};
var a2 = new int[] { 1, 2, 3};
var a3 = new int[] { 1, 2, 4};
var x = a1.SequenceEqual(a2); // true
var y = a1.SequenceEqual(a3); // false
If you can't use .NET 3.5 for some reason, your method is OK.
Compiler\run-time environment will optimize your loop so you don't need to worry...
How to auto-remove trailing whitespace in Eclipse?
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When would you call java's thread.run() instead of thread.start()?
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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'...