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Using do block vs braces {}
...u are doing a small operation, for example, a method call or a comparison, etc. so this makes perfect sense:
some_collection.each { |element| puts element }
But if you have slightly complex logic that goes to multiple lines then use do .. end like:
1.upto(10) do |x|
add_some_num = x + rand(10)...
Cast to int vs floor
...will run into some overflow issues) and for negative values below -100000, etc. But I've clocked it to be at least 3 times faster than floor, which was really critical for our application. Take it with a grain of salt, test it on your system, etc. but it's worth considering IMHO.
...
mongo - couldn't connect to server 127.0.0.1:27017
...hout preserving the original files
To find where you dbpath resides- vim /etc/mongodb.conf
check for option dbpath=
(I have dbpath=/var/lib/mongodb)
Default: /data/db/
Typical locations include: /srv/mongodb, /var/lib/mongodb or /opt/mongodb .
Replace the /var/lib/mongodb with your dbpath
sud...
Regex, every non-alphanumeric character except white space or colon
... which are typically not supported by older tools like grep, sed, tr, lex, etc.
– tripleee
Dec 6 '19 at 8:26
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What are “Groovy” and “Grails” and what kinds of applications are built using them?
...us the power of the JVM (for garbage collection, speed via JIT compilation etc.) and the conciseness of Groovy. The learning curve for a Java programmer to pick up Groovy is supposed to be pretty small (thus leveraging off the huge number of available Java programmers).
It's a very different way of...
Mac OS X - EnvironmentError: mysql_config not found
...
Step 6: relative to Macintosh HD locate paths and add to it
cd /private/etc/
then
nvim paths
and add
/usr/local/mysql/bin
*you'll again notice that this file has read-only access so if your using vim or neovim
:w !sudo tee %
then
cd ~
then refresh the terminal with your changes b...
Why can't I use Docker CMD multiple times to run multiple services?
...ice, ADD these in a directory, and run the supervisor with supervisord -c /etc/supervisor to point to a supervisor configuration file which loads all your services and looks like
[supervisord]
nodaemon=true
[include]
files = /etc/supervisor/conf.d/*.conf
If you would like more details, I wrote a...
C/C++ Struct vs Class
...no other class-like features: no methods, no constructor, no base classes, etc. Although C++ inherited the keyword, it extended the semantics. (This, however, is why things default to public in structs—a struct written like a C struct behaves like one.)
While it's possible to fake some OOP in C...
What is the maven-shade-plugin used for, and why would you want to relocate Java packages?
...rces of itself. Maven will be responsible to find out all artifacts (JARs etc) that the project depending on when the project is built.
An uber-jar is something that take all dependencies, and extract the content of the dependencies and put them with the classes/resources of the project itself, in...
Using braces with dynamic variable names in PHP
...ves you a not very useful $fixedTime$i instead of $fixedTime1, $fixedTime2 etc. (Fortunately spotted it almost straight away.)
– BeNice
Jan 27 '16 at 5:13
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