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Multiple Updates in MySQL
...has new records then i will end up inserting only the ids and count except all other information. if and only if there is an entry for the id then it should update else it should skip. what shall i do?
– Jayapal Chandran
Aug 30 '10 at 13:30
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How to check for valid email address? [duplicate]
...ere is no point. Even if you can verify that the email address is syntactically valid, you'll still need to check that it was not mistyped, and that it actually goes to the person you think it does. The only way to do that is to send them an email and have them click a link to verify.
Therefore, a ...
How to add default value for html ? [closed]
... to aid the user with data entry when the control has no value" [and it disappears as soon as user clicks into the textarea]. It will never act as "the default value" for the control. If you want that, you must put the desired text inside the Here is the actual default value, as per other answers he...
ActiveModel::ForbiddenAttributesError when creating new user
...mit(:what, :ever)
end
Update:
Here's a continuation project for CanCan called CanCanCan, which looks promising:
CanCanCan
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Why is there no xrange function in Python3?
...Some performance measurements, using timeit instead of trying to do it manually with time.
First, Apple 2.7.2 64-bit:
In [37]: %timeit collections.deque((x for x in xrange(10000000) if x%4 == 0), maxlen=0)
1 loops, best of 3: 1.05 s per loop
Now, python.org 3.3.0 64-bit:
In [83]: %timeit collec...
How to crop circular area from bitmap in Android
I have a bitmap and I want to crop a circular region from this bitmap. All pixels outside the circle should be transparent. How can I do this?
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How to work with Git branches and Rails migrations
...s and many of them include db migrations. We try to be careful but occasionally some piece of code in master asks for a column that got removed/renamed in another branch.
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What is the most “pythonic” way to iterate over a list in chunks?
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Finally got a chance to play around with this in a python session. For those who are as confused as I was, this is feeding the same iterator to izip_longest multiple times, causing it to consume successive values of the same seq...
Django DB Settings 'Improperly Configured' Error
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Apps aren't loaded yet.
– Daniil Mashkin
May 31 '18 at 12:53
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Generating random numbers in Objective-C
...te the S-Boxes via
arc4random_addrandom().
There is no need to call arc4random_stir() before using arc4random(), since arc4random() automatically
initializes itself.
EXAMPLES
The following produces a drop-in replacement for the traditional rand() and random() functions using
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