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How to sum up an array of integers in C#
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int sum = arr.AsParallel().Sum(); a faster version that uses multiple cores of the CPU. To avoid System.OverflowException you can use long sum = arr.AsParallel().Sum(x => (long)x); For even faster versions that avoid overflow exception and s...
Why aren't programs written in Assembly more often? [closed]
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ASM has poor legibility and isn't really maintainable compared to higher-level languages.
Also, there are many fewer ASM developers than for other more popular languages, such as C.
Furthermore, if you use a higher-level language and new ASM instructions beco...
selecting unique values from a column
...nstead of using SELECT * ... use SELECT column 1, column 2... Unless you really do need all columns.
– LPChip
Nov 18 '17 at 20:43
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Compiling C++11 with g++
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Don't forget to put -Wall -g just after g++
– Basile Starynkevitch
Apr 28 '12 at 13:41
7
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List of remotes for a Git repository?
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-v for "verbose" is actually the more common option. It's also supported by git branch. The basic difference is short vs long options (single vs double dash, essentially) That said, supporting --list with the remote subcommand would make sense. ...
Why does an NSInteger variable have to be cast to long when used as a format argument?
...ending on the platform, the compiler recommends
to add a cast to long generally.
Update: Since iOS 7 supports 64-bit now as well, you can get the same warning when compiling
for iOS.
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improv...
Detect if Visual C++ Redistributable for Visual Studio 2012 is installed
How to detect if Visual C++ Redistributable for Visual Studio 2012 is installed?
20 Answers
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Add new field to every document in a MongoDB collection
...field" : 1, "test" : "a" }
EDIT:
In case you want to add a new_field to all your collection, you have to use empty selector, and set multi flag to true (last param) to update all the documents
db.your_collection.update(
{},
{ $set: {"new_field": 1} },
false,
true
)
EDIT:
In the above ...
PDO Prepared Inserts multiple rows in single query
... table (fielda, fieldb, ... ) values (?,?...), (?,?...)....
That is basically how we want the insert statement to look like.
Now, the code:
function placeholders($text, $count=0, $separator=","){
$result = array();
if($count > 0){
for($x=0; $x<$count; $x++){
$re...
String strip() for JavaScript? [duplicate]
...eplace(...) to String(this).replace(...) or ('' + this).replace(...); this allows to call() or apply() the function to non-string values
– Christoph
Sep 13 '09 at 19:14
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