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sql primary key and index
...base set as the primary key. If I query off the ID often do I also need to index it? Or does it being a primary key mean it's already indexed?
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Save PL/pgSQL output from PostgreSQL to a CSV file
...e to your local PC. It also needs to be run as a Postgres "superuser" (normally called "root") because Postgres can't stop it doing nasty things with that machine's local filesystem.
That doesn't actually mean you have to be connected as a superuser (automating that would be a security risk of a di...
If Python is interpreted, what are .pyc files?
...'translated'. Python is then compiled to a bytecode. AFAIK, only Bash is really interpreted , all other popular "interpreted" languages are all compiled to a bytecode.
– bfontaine
Aug 6 '14 at 13:42
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How to use index in select statement?
Lets say in the employee table, I have created an index(idx_name) on the emp_name column of the table.
8 Answers
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Can I have multiple Xcode versions installed?
...est on iOS 7.1. I downloaded Xcode 6.4 from developer.apple.com/downloads/index.action (as per previous comments) and copied Xcode.app to /Applications/Xcode-6.4, from which it runs very happily (as per information provided in iosdevelopertips.com/xcode/…, again as per previous comments)
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Get selected value in dropdown list using JavaScript
... = document.getElementById("ddlViewBy");
var strUser = e.options[e.selectedIndex].value;
Would make strUser be 2. If what you actually want is test2, then do this:
var e = document.getElementById("ddlViewBy");
var strUser = e.options[e.selectedIndex].text;
Which would make strUser be test2
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Read/Write 'Extended' file properties (C#)
...s 10 or 7). Some headers are empty, so you need to loop through all of the indexes. (Of course, since there aren't millions of them, you could limit the loop to 1,000.)
– skst
Nov 17 '18 at 18:03
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How do I iterate through each element in an n-dimensional matrix in MATLAB?
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You can use linear indexing to access each element.
for idx = 1:numel(array)
element = array(idx)
....
end
This is useful if you don't need to know what i,j,k, you are at. However, if you don't need to know what index you are at, yo...
Apache and Node.js on the Same Server
... the ProxyPass directive in the Apache httpd.conf its not too hard to pipe all requests on a particular URL to your Node.JS application.
ProxyPass /node http://localhost:8000
Also, make sure the following lines are NOT commented out so you get the right proxy and submodule to reroute http request...
How to delete a word and go into insert mode in Vim?
...aw deletes the trailing space as well.
– Roberto Bonvallet
Sep 7 '09 at 4:38
5
:help objects in v...