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How to perform Callbacks in Objective-C
...Object:self]; to [object performSelector:selector withObject:self]; in order to get it to work correctly.
– Banjer
Oct 12 '10 at 1:48
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Date query with ISODate in mongodb doesn't seem to work
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In json strict mode, you'll have to keep the order:
{
"dt": {
"$gte": {
"$date": "2013-10-01T00:00:00.000Z"
}
}
}
Only thing which worked to define my search queries on mlab.com.
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Dynamic Sorting within SQL Stored Procedures
...eah, it's a pain, and the way you're doing it looks similar to what I do:
order by
case when @SortExpr = 'CustomerName' and @SortDir = 'ASC'
then CustomerName end asc,
case when @SortExpr = 'CustomerName' and @SortDir = 'DESC'
then CustomerName end desc,
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This, to me, is still much ...
Remove duplicate values from JS array [duplicate]
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}
This chunk of ugly code does the same as the snippet #3 above, but an order of magnitude faster (as of 2017 it's only twice as fast - JS core folks are doing a great job!)
function uniq(a) {
var seen = {};
return a.filter(function(item) {
return seen.hasOwnProperty(item)...
Array include any value from another array?
...on elements between the two arrays? What if the arrays were in a different order on each pass? What if feta appeared at the end of both arrays? As Marc-André stated, set intersection executes in linear time, so it makes sense that it is much more scalable for the general case, rather than the one s...
boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术
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//non-unique as some subscribers might have more than one number
ordered_non_unique<
composite_key<
phonebook_entry,
member<phonebook_entry,std::string,&phonebook_entry::family_name>,
member<phonebook_entry,std::string,&phonebook_entry::given_name>
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What are libtool's .la file for?
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Does it mean that in order to generate .la file, I need to use libtool (e.g. from automake)? One can rely on libtool to link the object files (gnu.org/software/libtool/manual/html_node/Using-Automake.html) but if I want to distribute a library wi...
MySQL get row position in ORDER BY
...sition
FROM TABLE t
JOIN (SELECT @rownum := 0) r
ORDER BY t.name) x
WHERE x.name = 'Beta'
...to get a unique position value. This:
SELECT t.id,
(SELECT COUNT(*)
FROM TABLE x
WHERE x.name <= t.name) AS position,
t.name
FROM TABLE...
Table name as variable
...OR
SELECT object_name(id) FROM syscolumns WHERE name = 'LastUpdated'
ORDER BY 1
OPEN tblcur
WHILE 1 = 1
BEGIN
FETCH tblcur INTO @tbl
IF @@fetch_status <> 0
BREAK
SELECT @sql =
N' SELECT @cnt = COUNT(*) FROM dbo.' + quotename(@tbl) +
N' WHERE LastUpdated BETWEEN @f...
Create a string of variable length, filled with a repeated character
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This is still MUCH slower (by 2 to 3 orders of magnitude) than my solution.
– Hogan
Sep 30 '15 at 19:09
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