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Why start an ArrayList with an initial capacity?
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edited Aug 7 '17 at 13:32
answered Mar 15 '13 at 10:47
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In what cases do I use malloc and/or new?
I see in C++ there are multiple ways to allocate and free data and I understand that when you call malloc you should call free and when you use the new operator you should pair with delete and it is a mistake to mix the two (e.g. Calling free() on something that was created with the new ...
When saving, how can you check if a field has changed?
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Essentially, you want to override the __init__ method of models.Model so that you keep a copy of the original value. This makes it so that you don't have to do another DB lookup (which is always a good thing).
class Person(models.Model):
name = models.CharF...
How to avoid having class data shared among instances?
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You want this:
class a:
def __init__(self):
self.list = []
Declaring the variables inside the class declaration makes them "class" members and not instance members. Declaring them inside the __init__ method makes sure that a new instance of th...
Recommended way to save uploaded files in a servlet application
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
How to print without newline or space?
...ython 2.6 you can either import the print function from Python 3 using the __future__ module:
from __future__ import print_function
which allows you to use the Python 3 solution above.
However, note that the flush keyword is not available in the version of the print function imported from __futu...
commandButton/commandLink/ajax action/listener method not invoked or input value not set/updated
...in web.xml,
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
and you are also not seeing any googlable errors and/or warnings in browser's JavaScript console (press F12 in Chrome/Fi...
SQL SERVER: Get total days between two dates
I'm trying to get the total number of days between two days:
9 Answers
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Can an interface extend multiple interfaces in Java?
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How to create a checkbox with a clickable label?
... checked).
– Levite
Mar 18 '15 at 9:32
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