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Delimiters in MySQL
...eople are using Delimiters. I tried myself to find out what are delimiters and what is their purpose. After 20 minutes of googling, I was not able to find an answer which satisfies me. So, my question is now: What are delimiters and when should I use them?
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How do I change the title of the “back” button on a Navigation Bar
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you can create a custom BaseViewController and put it in to -viewDidLoad:
– ArtFeel
Sep 6 '13 at 15:14
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Why is 128==128 false but 127==127 is true when comparing Integer wrappers in Java?
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When you compile a number literal in Java and assign it to a Integer (capital I) the compiler emits:
Integer b2 =Integer.valueOf(127)
This line of code is also generated when you use autoboxing.
valueOf is implemented such that certain numbers are "pooled", and i...
Pythonic way to check if a file exists? [duplicate]
Which is the preferred way to check if a file exists and if not create it?
5 Answers
5...
Rails :dependent => :destroy VS :dependent => :delete_all
...s with the callback.
The :delete_all is made directly in your application and deletes by SQL :
DELETE * FROM users where compagny_id = XXXX
With the :destroy, there is an instantiation of all of your children. So, if you can't destroy it or if each has their own :dependent, its callbacks can be ...
How to keep one variable constant with other one changing with row in excel
...ently selected cells with these keyboard shortcuts:
Windows: f4
Mac: CommandT
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How do you serialize a model instance in Django?
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You can easily use a list to wrap the required object and that's all what django serializers need to correctly serialize it, eg.:
from django.core import serializers
# assuming obj is a model instance
serialized_obj = serializers.serialize('json', [ obj, ])
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How do you use window.postMessage across domains?
... },
false);
</script>
</body>
</html>
A and B must be something like http://domain.com
EDIT:
From another question, it looks the domains(A and B here) must have a / for the postMessage to work properly.
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DateTime.ToString() format that can be used in a filename or extension?
...d but most of the DateTime methods I've tried output something with spaces and slashes. For instance:
8 Answers
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Are there any disadvantages to always using nvarchar(MAX)?
...when you store it to a VARCHAR(MAX) column, behind the screen the data is handled as a TEXT value. So there is some additional processing needed when dealing with a VARCHAR(MAX) value. (only if the size exceeds 8000)
VARCHAR(MAX) or NVARCHAR(MAX) is considered as a 'large value type'. Large value ty...