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Get the first element of each tuple in a list in Python [duplicate]
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@Creak - x,_ is just using tuple unpacking. And you are right, the documentation on this is hard to come by. I found this link and this one which should explain how it works. Also, the _ is just a normal variable. I could have done x,y and got the same results. How...
Read user input inside a loop
...;0
BTW, if you really are using cat this way, replace it with a redirect and things become even easier:
while read line; do
read -u 3 input
echo "$input"
done 3<&0 <notify-finished
Or, you can swap stdin and unit 3 in that version -- read the file with unit 3, and just leave s...
Which version of PostgreSQL am I running?
I'm in a corporate environment (running Debian Linux) and didn't install it myself. I access the databases using Navicat or phpPgAdmin (if that helps). I also don't have shell access to the server running the database.
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Uses of content-disposition in an HTTP response header
...ity concerns.
The authority on the content-disposition header is RFC 1806 and RFC 2183. People have also devised content-disposition hacking. It is important to note that the content-disposition header is not part of the HTTP 1.1 standard.
The HTTP 1.1 Standard (RFC 2616) also mentions the possibl...
How to source virtualenv activate in a Bash script
... script, you load it into that shell which exits when your script finishes and you're back to your original, unactivated shell.
Your best option would be to do it in a function
activate () {
. ../.env/bin/activate
}
or an alias
alias activate=". ../.env/bin/activate"
Hope this helps.
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How do you use gcc to generate assembly code in Intel syntax?
...um where someone claimed it worked for them.
I just tried this on the mac and it failed, so I looked in my man page:
-masm=dialect
Output asm instructions using selected dialect. Supported choices
are intel or att (the default one). Darwin does not support intel.
It may work o...
How to change value of process.env.PORT in node.js?
...ode -> simply use a space to use more than one variable on the same command
– p4bloch
Nov 18 '15 at 21:59
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Hash String via SHA-256 in Java
...;
import java.security.NoSuchAlgorithmException;
import java.nio.charset.StandardCharsets;
import java.math.BigInteger;
public class CryptoHash {
public static void main(String[] args) throws NoSuchAlgorithmException {
MessageDigest md = MessageDigest.getInstance("SHA-256");
String text =...
Place a button right aligned
...from the normal document flow so they can overflow their parent's boundary and mess up the parent's height, the clear:both CSS takes care of that (as does overflow:hidden). Play around with the JSFiddle example I added to see how floating and clearing behave (you'll want to drop the overflow:hidden ...
How to do a batch insert in MySQL
...e. What is the best way to do this in a query? Should I just make a loop and insert one record per iteration? Or is there a better way?
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