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Why does the C++ STL not provide any “tree” containers?
... general and involved enough to merit specialized tree classes independent from it. Also, the fact that std::map and std::set require a tree is, IMO, another argument for having an stl::red_black_tree etc. Finally, the std::map and std::set trees are balanced, an std::tree might not be.
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Converting a UNIX Timestamp to Formatted Date String
...an just call
$currentTime = new DateTime();
To create a DateTime object from a specific timestamp (i.e. not now)
$currentTime = DateTime::createFromFormat( 'U', $timestamp );
To get a formatted string you can then call
$formattedString = $currentTime->format( 'c' );
See the manual page h...
Accessing nested JavaScript objects and arays by string path
... using reduce is an excellent solution (one can also use _.reduce() from the underscore or lodash library)
– Alp
May 22 '14 at 14:51
4
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AWS S3: The bucket you are attempting to access must be addressed using the specified endpoint
...souces using the same client in the same region.
If the bucket is created from AWS S3 Console, then check the region from the console for that bucket then create a S3 Client in that region using the endpoint details mentioned in the above link.
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Struct constructor: “fields must be fully assigned before control is returned to the caller.”
...uct that has an automatic property, just call the parameterless contructor from your parameterized one by doing : this() example below:
struct MyStruct
{
public int SomeProp { get; set; }
public MyStruct(int someVal) : this()
{
this.SomeProp = someVal;
}
}
By calling :this() from yo...
Underscore: sortBy() based on multiple attributes
...de below I create a new array of patients sorted by Name within RoomNumber from the original array called patients.
var sortedPatients = _.chain(patients)
.sortBy('Name')
.sortBy('RoomNumber')
.value();
share
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Should private helper methods be static if they can be static
...y the state of the object" -perfect explanation of how to differentiate it from a private method.
– HopeKing
Jun 26 '17 at 15:33
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How do I fix "The expression of type List needs unchecked conversion…'?
...common problem when dealing with pre-Java 5 APIs. To automate the solution from erickson, you can create the following generic method:
public static <T> List<T> castList(Class<? extends T> clazz, Collection<?> c) {
List<T> r = new ArrayList<T>(c.size());
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How to sort by two fields in Java?
... then by age.
String.compareTo "Compares two strings lexicographically" - from the docs.
Collections.sort is a static method in the native Collections library. It does the actual sorting, you just need to provide a Comparator which defines how two elements in your list should be compared: this is ...
Linux error while loading shared libraries: cannot open shared object file: No such file or director
Program is part of the Xenomai test suite, cross-compiled from Linux PC into Linux+Xenomai ARM toolchain.
18 Answers
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