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Is there a MySQL option/feature to track history of changes to records?
I've been asked if I can keep track of the changes to the records in a MySQL database. So when a field has been changed, the old vs new is available and the date this took place. Is there a feature or common technique to do this?
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Best way to define private methods for a class in Objective-C
I just started programming Objective-C and, having a background in Java, wonder how people writing Objective-C programs deal with private methods.
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Maven Modules + Building a Single Specific Module
I have a multi-module Maven project with a parent project P and three sub-modules A , B , and C . Both B and C are war projects and both depend on A .
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Does pandas iterrows have performance issues?
I have noticed very poor performance when using iterrows from pandas.
6 Answers
6
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Double vs single quotes
I'm really new to Ruby and I'm trying to understand if there's a specific time when I should use "" vs '' .
8 Answers
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What does a colon following a C++ constructor name do? [duplicate]
What does the colon operator (":") do in this constructor? Is it equivalent to MyClass(m_classID = -1, m_userdata = 0); ?
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Choosing Mobile Web HTML5 Framework [closed]
For the new project, I have been searching for a framework with support of HTML5 and runs on mobile, that is IPhone, IPads. I found out these:
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How many levels of pointers can we have?
How many pointers ( * ) are allowed in a single variable?
14 Answers
14
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How do you create a toggle button?
I want to create a toggle button in html using css. I want it so that when you click on it , it stays pushed in and than when you click it on it again it pops out.
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How can I index a MATLAB array returned by a function without first assigning it to a local variable
For example, if I want to read the middle value from magic(5) , I can do so like this:
9 Answers
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