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Separation of business logic and data access in django
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if User.objects.get(pk=user_id).active:
raise ValidationError("This user cannot be activated")
# you can also check authorizations etc.
return user_id
def execute(self):
"""
This is not a standard method in the forms API; it is intended to r...
Java String - See if a string contains only numbers and not letters
...2 part, so I just replaced ^[0-9]*$ by ^[0-9]+$ to be sure I have at least one number.
– Y-B Cause
Nov 26 '17 at 23:27
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How can I join elements of an array in Bash?
...ction join { IFS=$1 eval '__="${*:2}"'; }. Then use __ after. Yes, I'm the one promoting use of __ as a result variable ;) (and a common iteration variable or temporary variable). If the concept gets to a popular Bash wiki site, they copied me :)
– konsolebox
N...
How to tell which commit a tag points to in Git?
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One way to do this would be with git rev-list. The following will output the commit to which a tag points:
$ git rev-list -n 1 $TAG
You could add it as an alias in ~/.gitconfig if you use it a lot:
[alias]
tagcommit = r...
How can I tell when a MySQL table was last updated?
...e MyISAM engine, not InnoDB. Although this is listed as a bug, it is mentioned in the MySQL 5.5 Reference, which also says that the file_per_table mode is an unreliable indicator of modification time.
– idoimaging
Sep 25 '12 at 21:49
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Access data in package subdirectory
...ted Oct 28 '16 at 18:16
ThorSummoner
10.6k1010 gold badges9494 silver badges123123 bronze badges
answered Apr 8 '11 at 23:42
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How to jump from Intellij terminal to editor with shortcut
...dow with Esc . In Intellij's terminal window, this does not work. Does anyone know how to do this with a keyboard shortcut? This would be nice since I can jump from my editor to the terminal with Alt + F12 but I cannot do it the other way without using my mouse.
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Find the last element of an array while using a foreach loop in PHP
...my's answer is well fit but I think it got little complex compared to this one. I have not ran any tests but I guess this answer shall be faster as it is not extracting array of keys.This shall have O(1) speed
– Vaibhav Kamble
Mar 20 '09 at 7:09
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What happens if a finally block throws an exception?
...e or networked disks; problems can be much more common with those. If someone yanks out a USB stick before a file has been fully written, it would be better to tell them immediately than wait until they get where they're going and find the file is corrupt. Yielding to the earlier error when there ...
How to extract numbers from a string in Python?
...trings like mumblejumble45mumblejumble in which I knew that there was only one number. The solution is simply int(filter(str.isdigit, your_string)).
– Jonas Lindeløv
Aug 20 '15 at 9:57
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