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How do I write a correct micro-benchmark in Java?
...2: Always run with -XX:+PrintCompilation, -verbose:gc, etc., so you can verify that the compiler and other parts of the JVM are not doing unexpected work during your timing phase.
Rule 2.1: Print messages at the beginning and end of timing and warmup phases, so you can verify that there is no outpu...
Adding a user to a group in django
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How to empty a Heroku database
...e, if you are using SHARED_DATABASE_URL:
$ heroku pg:reset DATABASE_URL
Now to recreate the database with nothing in it:
$ heroku run rake db:migrate
To populate the database with your seed data:
$ heroku run rake db:seed
---OR---
You can combine the last two (migrate & seed) into on...
Does Python's time.time() return the local or UTC timestamp?
... gives you timestamp. Just remove the milliseconds - str(datetime.datetime.now()).split('.')[0]
– Hussain
Jan 3 '13 at 13:25
17
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JavaScript: How to find out if the user browser is Chrome?
...heck if browser is Google Chrome, try this:
// please note,
// that IE11 now returns undefined again for window.chrome
// and new Opera 30 outputs true for window.chrome
// but needs to check if window.opr is not undefined
// and new IE Edge outputs to true now for window.chrome
// and if not iOS ...
Git interactive rebase no commits to pick
...u have to rebase onto a particular commit.
With a non-interactive rebase, if you supply a direct ancestor of the current commit then you aren't changing anything; with an interactive rebase you can edit commits after the commit that you are rebasing onto, even if the commit is a direct ancestor of ...
Remove large .pack file created by git
... a load of files in to a branch and merged and then had to remove them and now I'm left with a large .pack file that I don't know how to get rid of.
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How to get the day of week and the month of the year?
I don't know much about Javascript, and the other questions I found are related to operations on dates, not only getting the information as I need it.
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How to change current working directory using a batch file
...
Specify /D to change the drive also.
CD /D %root%
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How to run an EXE file in PowerShell with parameters with spaces and quotes
...y echos it to the screen, for example:
PS> "Hello World"
Hello World
If you want PowerShell to interpret the string as a command name then use the call operator (&) like so:
PS> & 'C:\Program Files\IIS\Microsoft Web Deploy\msdeploy.exe'
After that you probably only need to quote ...