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How to map a composite key with JPA and Hibernate?
...w this question is not strictly about JPA but the rules defined by the specification also applies. So here they are:
2.1.4 Primary Keys and Entity Identity
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A composite primary key must
correspond to either a single
persistent field or property or to a
set of such fields or pr...
How to force a line break in a long word in a DIV?
...word-wrap today still work as it is an alias for overflow-wrap per the specification.
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How to get a date in YYYY-MM-DD format from a TSQL datetime field?
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If you take the default, in this case, you get the time value - the entire format for format 120 is 'yyyy-mm-dd hh:mi:ss'. By explicitly declaring the length, it is trimmed to the format you specified in yout original note -...
Get java.nio.file.Path object from java.io.File
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How to force JS to do math instead of putting two strings together
...arseInt(document.getElementById("txt").value, 10);
Note: The 10 here specifies decimal (base-10). Without this some browsers may not interpret the string correctly. See MDN: parseInt.
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Change string color with NSAttributedString?
... simple solution will work with all versions of iOS, not just iOS 6.
But if you needlessly wish to use NSAttributedString, you can do something like this:
UIColor *color = [UIColor redColor]; // select needed color
NSString *string = ... // the string to colorize
NSDictionary *attrs = @{ NSForegr...
Content Security Policy “data” not working for base64 Images in Chrome 28
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According to the grammar in the CSP spec, you need to specify schemes as scheme:, not just scheme. So, you need to change the image source directive to:
img-src 'self' data:;
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What does it mean to start a PHP function with an ampersand?
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Chrome: Uncaught SyntaxError: Unexpected end of input
...s wrong with my json request. i just had no idea where to start debugging. if i may ask how did you determine the root cause
– dlaurent86
Aug 29 '10 at 13:52
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Overlaying histograms with ggplot2 in R
...ere's a concrete example with some output:
dat <- data.frame(xx = c(runif(100,20,50),runif(100,40,80),runif(100,0,30)),yy = rep(letters[1:3],each = 100))
ggplot(dat,aes(x=xx)) +
geom_histogram(data=subset(dat,yy == 'a'),fill = "red", alpha = 0.2) +
geom_histogram(data=subset(dat,yy == ...