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How expensive is RTTI?
...;typeid()
5) 14,261,000 Ticks (~23 Seconds) - typeid() with extra variable allocations.
So the conclusion would be:
For simple cast cases without optimisation typeid() is more than twice faster than dyncamic_cast.
On a modern machine the difference between the two is about 1 nanosecond (a milliont...
One-liner to recursively list directories in Ruby?
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In PHP or other languages to get the content of a directory and all its subdirectories, you have to write some lines of code, but in Ruby it takes 2 lines:
require 'find'
Find.find('./') do |f| p f end
this will print the con...
What is the difference between double-ampersand (&&) and semicolon (;) in Linux Bash?
...o make sure that command2 is only run if command1 ran successfully.
The ; token just separates commands, so it will run the second command regardless of whether or not the first one succeeds.
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How to download a file from server using SSH? [closed]
...ote/dir/foobar.txt /local/dir
From: http://www.hypexr.org/linux_scp_help.php
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edited Mar 14 '15 at 9:31
Marek Grzenkowicz
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What optimizations can GHC be expected to perform reliably?
...pose of floatInwards is floating into branches of a case, so that we don't allocate things, save them on the stack, and then discover that they aren't needed in the chosen branch.
As an example, suppose we had this expression:
let x = big in
case v of
True -> x + 1
False -&g...
Approximate cost to access various caches and main memory?
...s PINNED MEMORY for all CUDA Contexts, not just the one, current, when the allocation was performed
| ___HostAllocWriteCombined_MEM / cudaHostFree() +---------------- cudaHostRegisterMapped -- maps memory allocation into the CUD...
Remove characters after specific character in string, then remove substring?
...Url class already built for you.
I must also point out, however, that the PHP's replaceAll uses regular expressions for search pattern, which you can do in .NET as well - look at the RegEx class.
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How to reset Jenkins security settings from the command line?
...>#" "/usr/share/jenkins/ref/users/admin/config.xml" sed -i -e "s#<apiToken>.*</apiToken>#<apiToken>${API_TOKEN}</apiToken>#" "/usr/share/jenkins/ref/users/admin/config.xml" ```
– Laurent Picquet
May 19 '17 at 7:33
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CodeIgniter: How to get Controller, Action, URL information
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Not if you change the routes in routes.php, $this->router returns the class the code runs in, but not the actual router masked with the override. Both answers are quite useful based on what you want to do.
– Tibor Szasz
Ja...
How do you check “if not null” with Eloquent?
...on - ".....\vendor\laravel\framework\src\Illuminate\Database\Query\Builder.php"
– Atiqur
Oct 2 '16 at 5:05
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