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Properties vs Methods
...is static but returns a value that can be changed.
The member returns an array. Properties that return arrays can be
very misleading. Usually it is
necessary to return a copy of the
internal array so that the user cannot
change internal state. This, coupled
with the fact that a user can ...
Do any JVM's JIT compilers generate code that uses vectorized floating point instructions?
...
Or roughly 2.4 times faster. We need to use direct NIO buffers instead of arrays, but HotSpot can access direct NIO buffers as fast as arrays. On the other hand, manually unrolling the loop does not provide a measurable boost in performance, in this case.
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.NET / C# - Convert char[] to string
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String mystring = new String(mychararray);
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Access POST values in Symfony2 request object
...ll be removed in 3.0, see documentation
$form->getData();
gives you an array for the form parameters
from symfony2 book page 162 (Chapter 12: Forms)
[...] sometimes, you may just want to use a form without a class, and get back an array of the submitted
data. This is actually really easy:
public...
Declare slice or make slice?
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If you're building an API and return an array as the response, using the declarative form will return nil in case your slice doesn't have any element, rather than an empty array. However, if make is used to create the slice, an empty array will be returned instea...
For every character in string
...(str[i]);
}
Looping through the characters of a null-terminated character array:
char* str = ???;
for(char* it = str; *it; ++it) {
do_things_with(*it);
}
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Catching java.lang.OutOfMemoryError?
...ant to catch OutOfMemory error: when it is caused by trying to allocate an array with more than 2G elements. The error name is a bit of a misnomer in this case, but it is still an OOM.
– Charles Roth
May 5 '16 at 19:02
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D Programming Language in the real world? [closed]
...multi-page template error messages when you screw up just to use resizable arrays.
Unlike Java and other bondage-and-discipline languages, D assumes that sometimes pointers, unsafe casts, manual memory management, etc. are a necessary evil, and assumes you're smart enough to handle real templates...
using lodash .groupBy. how to add your own keys for grouped output?
...: "77"
}];
console.log(
_.chain(data)
// Group the elements of Array based on `color` property
.groupBy("color")
// `key` is group's name (color), `value` is the array of objects
.map((value, key) => ({ color: key, users: value }))
.value()
);
<script src="htt...
Most efficient way to determine if a Lua table is empty (contains no entries)?
... way to determine if a table is empty (that is, currently contains neither array-style values nor dict-style values)?
8 Ans...