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Where does PostgreSQL store the database?
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show data_directory; command points to exact location of data. Searching specific folder is painful as someone else might have installed it for you and now you do not know the configuration, so following sql helps to save the time. :) Thanks Mike.
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Ruby Arrays: select(), collect(), and map()
..., but a Hash. You can also use select here, but the block is given the key and value in this case:
irb(main):001:0> h = {:sku=>"507772-B21", :desc=>"HP 1TB 3G SATA 7.2K RPM LFF (3 .", :qty=>"", :qty2=>"1", :price=>"5,204.34 P"}
irb(main):002:0> h.select { |key, value| !value.em...
Cython: “fatal error: numpy/arrayobject.h: No such file or directory”
... You don't need to create a setup.py ... you don't need to even open a command line if you use IPython ... it's all very convenient. In your case, try running these commands in IPython or in a normal Python script:
import numpy
import pyximport
pyximport.install(setup_args={"script_args":["--compil...
git diff file against its last change
...ble to get git to produce a diff between a specific file as it exists now, and as it existed before the last commit that changed it?
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CSS :not(:last-child):after selector
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If it's a problem with the not selector, you can set all of them and override the last one
li:after
{
content: ' |';
}
li:last-child:after
{
content: '';
}
or if you can use before, no need for last-child
li+li:before
{
content: '| ';
}
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Do I need Content-Type: application/octet-stream for file download?
The HTTP standard says:
1 Answer
1
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Return first match of Ruby regex
I'm looking for a way to perform a regex match on a string in Ruby and have it short-circuit on the first match.
5 Answers
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What underlies this JavaScript idiom: var self = this?
...his even as the context is changing. It's a technique often used in event handlers (especially in closures).
Edit: Note that using self is now discouraged as window.self exists and has the potential to cause errors if you are not careful.
What you call the variable doesn't particularly matter. va...
Get the current user, within an ApiController action, without passing the userID as a parameter
...ction always returns null. The user is auth'd, I'm passing a bearer token, and the ApiController has the [Authorize] header
– Joshua Ohana
Feb 22 '15 at 13:52
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Message 'src refspec master does not match any' when pushing commits in Git
... Don't just follow this step blindly, look at what @Vi has mentioned, and then modify your push command to correct ref.
– Kumar
Jun 7 '12 at 16:43
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