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What's the difference between an argument and a parameter?
...ng else. Either way the other people know what I mean, but what's correct, and what's the history of the terms?
34 Answers
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Recompile Heroku slug without push or config change
...is a way to force Heroku to recompile the slug without pushing new commits and/or updating the config variables.
9 Answers
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Group by month and year in MySQL
...Performance... my test of GROUP BY YEAR(date), MONTH(date) DESC; (~450 ms) and GROUP BY DATE_FORMAT(date,'%Y-%m') (~850 ms) on a InnoDB table with > 300,000 entries showed the former (the marked answer to this question) took ~half the time as the latter.
– ow3n
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Multiple contexts with the same path error running web service in Eclipse using Tomcat
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Search for the server.xml file and check your <Context> tags, probably there are multiple definitions for the same path. Remove the duplicates and it should work for you.
Check out the answer here.
Auto-format the xml file (control + shift + f) sin...
How can I add new array elements at the beginning of an array in Javascript?
...push - add an element to the beginning/end of an array
shift/pop - remove and return the first/last element of an array
A simple diagram...
unshift -> array <- push
shift <- array -> pop
and chart:
add remove start end
push X X
pop ...
How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
... I have a table with a varchar column. The data is supposed to be integers and I need it in integer type in a query. Some values are empty strings.
The following:
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How do I install pip on macOS or OS X?
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If you are behind a proxy, make sure http_proxy and https_proxy are set correctly, then use the '-E' option with sudo: sudo -E easy_install pip
– Neil Schaper
Aug 4 '14 at 20:10
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How can I set NODE_ENV=production on Windows?
...tained), use
set NODE_ENV=production
This should be executed in the command prompt where you intend to run your Node.js application.
The above line would set the environment variable NODE_ENV for the command prompt where you execute the command.
To set environment variables globally so they per...
How to use ssh agent forwarding with “vagrant ssh”?
...onfig.ssh.forward_agent to TRUE in the Vagrantfile, then rebooted the VM, and tried using:
9 Answers
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Add a prefix string to beginning of each line
...can use any other character not in prefix, or
escape the /, so the sed command becomes
's#^#/opt/workdir#'
# or
's/^/\/opt\/workdir/'
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