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mysql Foreign key constraint is incorrectly formed error
...to ID in table1 I get the error Foreign key constraint is incorrectly formed error . I would like to delete table 2 record if table1 record gets deleted. Thanks for any help
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How does the HyperLogLog algorithm work?
...le. Assume you have two elements and your hash function which gives values form 0 to 2^10 produced 2 values: 344 and 387. You decided to have 16 buckets. So you have:
0101 011000 bucket 5 will store 1
0110 000011 bucket 6 will store 4
By having more buckets you decrease the variance (you use sl...
How to display HTML tags as plain text [duplicate]
I have an input form on my website where HTML is allowed and I'm trying to add instructions about the use of HTML tags. I'd like the text to
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How to properly document S4 class slots using Roxygen2?
...0, current as of 5.0.1.
For S4, the best practice is documentation in the form:
#' \section{Slots}{
#' \describe{
#' \item{\code{a}:}{Object of class \code{"numeric"}.}
#' \item{\code{b}:}{Object of class \code{"character"}.}
#' }
#' }
This is consistent with the internal repr...
How to support placeholder attribute in IE8 and 9
...he link suggested in the question didn't work for me; it had problems with form submit. The solution you have suggested in this answer seems a lot more robust and worked a treat.
– Jonny White
Sep 11 '13 at 19:03
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How to build jars from IntelliJ properly?
...e a new run/debug configuration:
Choose application:
Fill in the form
Add the "assembly:single" maven goal after build to be executed last
Save it, then run
This procedure will create the jar file under the "target" folder
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How do I declare a global variable in VBA?
... be used in all
'modules, class modules and userforms of
'thisworkbook and will preserve any values
'assigned to it until either the workbook
'is closed or the project is reset.
Dim Var2 As ...
Does Java read integers in little endian or big endian?
...
Bitwise endianness also comes into play with compression formats that use some form of Huffman encoding (i.e. all of them). For extra fun, JPEG is "bitwise big-endian" (i.e. the most significant bit is the "first" bit) and LZ is "bitwise little-endian". I once worked on a proprie...
How do you turn off auto-capitalisation in HTML form fields in iOS?
By default, iOS’s keyboard sets the first letter in text form fields (including type=email ) to uppercase. (At least prior to iOS 5.)
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Google Play app description formatting
... application that is available on Google Play. Now I want to add some more formatting to my app description (eg. indent, links, lists..). But I cannot find any website where possible formatting is listed. Google Help pages cannot help me either on this subject. There exists a lot of different format...