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Best way to get child nodes
...ference between childNodes and children, which is that childNodes contains all nodes, including text nodes consisting entirely of whitespace, while children is a collection of just the child nodes that are elements. That's really all there is to it.
There is nothing unpredictable about either colle...
Why would iterating over a List be faster than indexing through it?
...nt head -> item1 -> print item1 -> item2 -> print item2 etc.
all in a single traversal, which is O(N).
Now, going to the other implementation of List which is ArrayList, that one is backed by a simple array. In that case both of the above traversals are equivalent, since an array is c...
Are there benefits of passing by pointer over passing by reference in C++?
...ect", then use a pointer instead of a reference.
Also, passing by pointer allows you to explicitly see at the call site whether the object is passed by value or by reference:
// Is mySprite passed by value or by reference? You can't tell
// without looking at the definition of func()
func(mySpri...
How to hide output of subprocess in Python 2.7
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edited Dec 6 '16 at 21:13
answered Jul 14 '16 at 21:32
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How to copy a collection from one database to another in MongoDB
...so some documents may incur type changes. mongodump/mongorestore are generally the better approach.
– Stennie
Jul 19 '12 at 6:17
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Why is unsigned integer overflow defined behavior but signed integer overflow isn't?
...to implement with the integer representation it used. C implementations usually used the same representation used by the CPU - so the overflow behavior followed from the integer representation used by the CPU.
In practice, it is only the representations for signed values that may differ according to...
How to Store Historical Data
...current, active record. So, let's say I have table FOO. Under my system, all active records will go in FOO, and all historical records will go in FOO_Hist. Many different fields in FOO can be updated by the user, so I want to keep an accurate account of everything updated. FOO_Hist holds the exa...
Connection timeout for SQL server
...d, you can specify a higher connection timeout value, but I doubt that's really the issue.
When you get connection timeouts, it's typically a problem with one of the following:
Network configuration - slow connection between your web server/dev box and the SQL server. Increasing the timeout may c...
What is “Orthogonality”?
...gn, operations do not have side effects; each action (whether it's an API call, a macro invocation, or a language operation) changes just one thing without affecting others. There is one and only one way to change each property of whatever system you are controlling.
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What does %~dp0 mean, and how does it work?
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Calling
for /?
in the command-line gives help about this syntax (which can be used outside FOR, too, this is just the place where help can be found).
In addition, substitution of FOR
variable references has been enhan...