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Is it possible to figure out the parameter type and return type of a lambda?
... test code below:
int main()
{
auto lambda = [](int i) { return long(i*10); };
typedef function_traits<decltype(lambda)> traits;
static_assert(std::is_same<long, traits::result_type>::value, "err");
static_assert(std::is_same<int, traits::arg<0>::type>::valu...
Which is faster: multiple single INSERTs or one multiple-row INSERT?
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10 Answers
10
Active
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Django select only rows with duplicate field values
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10
try using aggregation
Literal.objects.values('name').annotate(name_count=Count('name')).exclud...
Java null check why use == instead of .equals()
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edited Dec 21 '10 at 16:37
answered Dec 21 '10 at 15:50
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What's the difference between isset() and array_key_exists()? [duplicate]
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answered Jul 9 '10 at 8:19
deceze♦deceze
454k7373 gold badges641641 silver badges784784 bronze badges
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How do I disable text selection with CSS or JavaScript? [duplicate]
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answered Sep 23 '10 at 14:44
JeromeJerome
7,99322 gold badges2929 silver badges4040 bronze badges
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How to convert ActiveRecord results into an array of hashes
...;< TaskStoreStatus.last.as_json
tasks_records << { :task_id => 10, :store_name => "Koramanagala", :store_region => "India" }
tasks_records.to_json
serializable_hash
You can also convert any ActiveRecord objects to a Hash with serializable_hash and you can convert any ActiveRecor...
Undo svn add without reverting local edits
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answered Apr 12 '12 at 10:08
Juampy NRJuampy NR
2,0421919 silver badges1818 bronze badges
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how do I strip white space when grabbing text with jQuery?
...t to trim.
– annakata
Dec 18 '08 at 10:04
1
You are correct annakata, I removed the /i because it...
Fastest Way to Find Distance Between Two Lat/Long Points
...able
WHERE MBRContains(LineFromText(CONCAT(
'('
, @lon + 10 / ( 111.1 / cos(RADIANS(@lon)))
, ' '
, @lat + 10 / 111.1
, ','
, @lon - 10 / ( 111.1 / cos(RADIANS(@lat)))
, ' '
, @lat - 10 / 111.1
, ')' )
,mypoint)
, ...