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Difference between map and collect in Ruby?
...chmark code:
require 'benchmark'
h = { abc: 'hello', 'another_key' => 123, 4567 => 'third' }
a = 1..10
many = 500_000
Benchmark.bm do |b|
GC.start
b.report("hash keys collect") do
many.times do
h.keys.collect(&:to_s)
end
end
GC.start
b.report("hash keys map") ...
Have nginx access_log and error_log log to STDOUT and STDERR of master process
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In docker image of PHP-FPM, i've see such approach:
# cat /usr/local/etc/php-fpm.d/docker.conf
[global]
error_log = /proc/self/fd/2
[www]
; if we send this to /proc/self/fd/1, it never appears
access.log = /proc/self/fd/2
...
Remove a symlink to a directory
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123
ah yes. that makes sense. I never typed foo, I typed f<tab> and bash filled in a / for me.
– Matthew Scouten
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What's the difference between VARCHAR and CHAR?
...
123
CHAR Vs VARCHAR
CHAR is used for Fixed Length Size Variable
VARCHAR is used for Variable Leng...
Is there a better way to run a command N times in bash?
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123
Another simple way to hack it:
seq 20 | xargs -Iz echo "Hi there"
run echo 20 times.
Not...
Simple calculations for working with lat/lon and km distance?
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If you're using Java, Javascript or PHP, then there's a library that will do these calculations exactly, using some amusingly complicated (but still fast) trigonometry:
http://www.jstott.me.uk/jcoord/
...
Filter dataframe rows if value in column is in a set list of values [duplicate]
...e,
str.contains('pandas', case=False)
would match PANDAS, PanDAs, paNdAs123, and so on.
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How to make an AJAX call without jQuery?
...ippet you can do similar things pretty easily, like this:
ajax.get('/test.php', {foo: 'bar'}, function() {});
Here is the snippet:
var ajax = {};
ajax.x = function () {
if (typeof XMLHttpRequest !== 'undefined') {
return new XMLHttpRequest();
}
var versions = [
"MSXML...
Is bool a native C type?
...re all of its elements to be addressable (e.g. _Bool* ptr = &boolArray[123]).
– Dai
Apr 5 at 0:05
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How to print from GitHub
..., the tool is useless if it is not reliable.
– Ragnar123
Oct 28 '14 at 13:24
21
note that this op...