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What are the differences between Abstract Factory and Factory design patterns?
...at is the most important part is left unanswered, and that is: when to use one, and when the other pattern?
– croraf
Jan 2 '14 at 23:58
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Postgres: SQL to list table foreign keys
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It indeed breaks with more than one column in constraint. For Postgres, there is a way of getting this information from the pg_catalog schema. See my answer below.
– martin
Jun 8 '12 at 14:07
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Wait 5 seconds before executing next line
... blocking operation. It suits that job fine, so I thought I post it for anyone else who arrives here with a similar use case. Even so, it's creating a Date() object in a while loop, which might very overwhelm the GC if it runs long enough. But I can't emphasize enough, this is only suitable for test...
Key existence check in HashMap
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This is the HashMap source code.
Resources :
HashMap source code Bad one
HashMap source code Good one
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Setting different color for each series in scatter plot on matplotlib
...le and specifying the colours you want to loop over, using next to get the one you want. For example, with 3 colours:
import itertools
colors = itertools.cycle(["r", "b", "g"])
for y in ys:
plt.scatter(x, y, color=next(colors))
Come to think of it, maybe it's cleaner not to use zip with the ...
scp with port number specified
...ess times, and modes from the original file.
Update and aside to address one of the (heavily upvoted) comments:
With regard to Abdull's comment about scp option order, what he suggests:
scp -P80 -r some_directory -P 80 ...
..., intersperses options and parameters. getopt(1) clearly defines th...
Script to get the HTTP status code of a list of urls?
...l -o /dev/null --silent --head --write-out "%{http_code} $LINE\n" "$LINE"
done < url-list.txt
(Eagle-eyed readers will notice that this uses one curl process per URL, which imposes fork and TCP connection penalties. It would be faster if multiple URLs were combined in a single curl, but there i...
Removing cordova plugins from the project
...me reason my VS2013 project does not list any and remove does not work. Gone to old fashion config.xml editing and plugin folder deletes...
– Anthony Horne
Sep 22 '15 at 11:35
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Remove tracking branches no longer on remote
...y to edit the list before deleting branches, you could do the following in one line:
git branch --merged >/tmp/merged-branches && \
vi /tmp/merged-branches && xargs git branch -d </tmp/merged-branches
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Difference between “process.stdout.write” and “console.log” in node.js?
...rmated and also that weird character did disappear
You can write more than one string
console.log("Hello", "World");
You can make associations
console.log("Hello %s", "World") //Useful when "World" is inside a variable
An that's it, that added functionality is given thanks to the util.format.app...