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switch / pattern matching idea
...tern match covers every possible case available, fully described, warnings from the compiler if you do not. While you can rightfully argue that the default case does this, it also is often in practice a run-time exception.
– VoronoiPotato
Aug 6 '19 at 15:36
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Read error response body in Java
...BAD_REQUEST) {
_is = httpConn.getInputStream();
} else {
/* error from server */
_is = httpConn.getErrorStream();
}
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Interfaces with static fields in java for sharing 'constants'
...va 1.5+, you can use static imports to import the constants/static methods from another class/interface:
import static com.kittens.kittenpolisher.KittenConstants.*;
This avoids the ugliness of making your classes implement interfaces that have no functionality.
As for the practice of having a cl...
What does cmd /C mean? [closed]
...n understand cmd but not cmd /c . I was trying to invoke a java program from the current for which I use Runtime.getRuntime().exec("cmd /C java helloworld"); There arises my doubt.
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Why doesn't std::queue::pop return value.?
...queue (top_position in my naive implementation) and the element is removed from the queue (and not returned). For all intents and purposes (no matter how you catch the exception in client code) the element at the top of the queue is lost.
This implementation is also inefficient in the case when you...
How do I bind a WPF DataGrid to a variable number of columns?
...out binding only to DataGrid. 2. Check e.OldValue for null and unsubscribe from CollectionChanged event to prevent memory leaks. Just for your convince.
– Mike Eshva
Oct 23 '13 at 13:01
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HTML: Include, or exclude, optional closing tags?
...not contain block-level elements, and <P> is a block level element. From (w3.org/TR/REC-html40/struct/text.html#edef-P) "The P element represents a paragraph. It cannot contain block-level elements (including P itself)."
– Ian Boyd
Jun 9 '10 at 20:25
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Syntax behind sorted(key=lambda: …)
...e:
sorted(mylist)
[2, 3, 3, 4, 6, 8, 23] # all numbers are in order from small to large.
Example 1:
mylist = [3,6,3,2,4,8,23]
sorted(mylist, key=lambda x: x%2==0)
[3, 3, 23, 6, 2, 4, 8] # Does this sorted result make intuitive sense to you?
Notice that my lambda function told sorte...
How to pass parameters to the DbContext.Database.ExecuteSqlCommand method?
...but this mechanism allows for SQL injection and also prevents the database from reusing an execution plan when the statement shows up again but with different values.
– Greg Biles
Nov 4 '11 at 16:52
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Python: changing value in a tuple
...t is better not to assume that the original poster is creating all of this from scratch doesn't know any better. More often we are dealing with output from another module or data source in a format or type that we cant control.
– rtphokie
Jan 6 '18 at 17:15
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