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Will strlen be calculated multiple times if used in a loop condition?
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@Prætorian, good point on the zero length string. I didn't consider that case when I wrote my comment. Does C++ evaluate the i > 0 expression on initial loop entry? If it doesn't, then you're right, the zero length case will...
SQL JOIN - WHERE clause vs. ON clause
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@JamesHutchison It's tough to make reliable performance generalizations based on observed behaviors like this. What was true one day tends to be wrong the next, because this is an implementation detail rather than documented behavior. Database teams are always look...
How to check for an active Internet connection on iOS or macOS?
...y via closures
let reachability = Reachability()!
reachability.whenReachable = { reachability in
if reachability.connection == .wifi {
print("Reachable via WiFi")
} else {
print("Reachable via Cellular")
}
}
reachability.whenUnreachable = { _ in
print("Not reachabl...
How to iterate through a DataTable
I need to iterate through a DataTable . I have an column there named ImagePath .
4 Answers
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How can I merge properties of two JavaScript objects dynamically?
...and you would also want to merge the attributes.
– Xiè Jìléi
Oct 24 '10 at 10:56
72
This only ...
@Basic(optional = false) vs @Column(nullable = false) in JPA
... So, which really should be used, maybe both?
– Xiè Jìléi
Apr 9 '11 at 7:47
39
@Xie Jilei: ...
Easiest way to detect Internet connection on iOS?
...through HTTPUrlConnection instantly fail if there is no connection available. This seems like completely sane behavior, and I was surprised to find NSURLConnection in iOS did not emulate it.
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JSON Naming Convention (snake_case, camelCase or PascalCase) [closed]
...ense as they are pretty java oriented.
– Thomas Andreè Wang
Jun 29 '17 at 12:54
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show 5 more comments
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How to use a class from one C# project with another C# project
...ect.
Change the default name of the file to something like library.py or façade.java, etc.
NOW the code recommendations to import libraries or using namespaces will work as described in the comments above and you don't have to change path statements or change solutions paths and solution names th...
Redis command to get all available keys?
... CLI usage example: redis-cli keys "*"
– XåpplI'-I0llwlg'I -
Nov 28 '16 at 10:11
4
C...