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What is the use of ObservableCollection in .net?
... me. The list has a lot of things on there like:
Louis Vuitton handbag ($5000)
Clive Christian’s Imperial Majesty Perfume ($215,000 )
Gucci Sunglasses ($2000)
hahaha well I"m not buying that stuff. So I cross them off and remove them from the list and I add instead:
12 dozen Titleist golf balls...
Convert a list of data frames into one data frame
...ications elapsed relative
4 data.table_rbindlist 100 0.11 1.000
1 do.call 100 9.39 85.364
2 plyr_rbind.fill 100 12.08 109.818
3 plyr_ldply 100 15.14 137.636
...
mysql check collation of a table
...s utf8_general_ci vs utf8_unicode_ci. This can cause error messages like HY000, 1267, Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8_unicode_ci,IMPLICIT) for operation '='... which is the message that brought me to this page.
– Dewi Morgan
Sep 2...
Copy a file in a sane, safe and efficient way
...man-pages/man2/sendfile.2.html
sendfile() will transfer at most 0x7ffff000 (2,147,479,552) bytes,
returning the number of bytes actually transferred. (This is true on
both 32-bit and 64-bit systems.)
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Function vs. Stored Procedure in SQL Server
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wha7ever
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answered Jul 24 '09 at 19:42
MyItchyChinMyItchyC...
What are valid values for the id attribute in HTML?
... insist that any application a vendor develops runs in IE6. This is for 30,000 users. Heck, if we could just get them to update their browsers on all those desktops, it might just help the unemployment rate.
– Karl
Sep 13 '12 at 13:50
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Efficient way to insert a number into a sorted array of numbers?
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Just as a single data point, for kicks I tested this out inserting 1000 random elements into an array of 100,000 pre-sorted numbers using the two methods using Chrome on Windows 7:
First Method:
~54 milliseconds
Second Method:
~57 seconds
So, at least on this setup, the native method doesn...
How does the HyperLogLog algorithm work?
...hance that this stream has a cardinality of 8" Can you please explain why 000 means expected number of trials 2^3. I tried to compute math expectation of number of trials assuming we have at least one run with 3 zeros and no runs with 4 zeros...
– yura
Aug 9 '...
Image fingerprint to compare similarity of many images
I need to create fingerprints of many images (about 100.000 existing, 1000 new per day, RGB, JPEG, max size 800x800) to compare every image to every other image very fast. I can't use binary compare methods because also images which are nearly similar should be recognized.
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Insert code into the page context using a content script
...rong?
– Mars Robertson
Jun 9 '13 at 11:17
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@Qantas94Heavy The extension's CSP does not affect co...