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PersistentObjectException: detached entity passed to persist thrown by JPA and Hibernate
...r properties to the corresponding getters. A big word of caution is not to mix "Field" and "Property" access types within the entity class otherwise the behavior is undefined by the JSR-317 specifications.
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Check if a program exists from a Makefile
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I mixed the solutions from @kenorb and @0xF and got this:
DOT := $(shell command -v dot 2> /dev/null)
all:
ifndef DOT
$(error "dot is not available please install graphviz")
endif
dot -Tpdf -o pres.pdf pres.dot
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“std::endl” vs “\n”
... be buffered and the cerr will go direct to the output this resulting in a mixed mode display. Use cerr for what it is supposed to be for (errors) and cout for what it is designed for (normal interaction).
– Martin York
Feb 3 '10 at 16:39
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How do I compare two strings in Perl?
...but not use locale ':not_characters') is in effect. See perllocale. Do not mix these with Unicode, only with legacy binary encodings. The standard Unicode::Collate and Unicode::Collate::Locale modules offer much more powerful solutions to collation issues.
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html - table row like a link
...limited to not putting block elements inside the <a>.
You also can't mix this in with a regular <table>
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Why is the tag deprecated in HTML?
...e HTML tags, represent meaning and structure, not appearance. It was badly mixed up in early versions of HTML but the standards people are trying to clean that up now.
One problem with letting tags control appearance is that your pages don't play well with devices for the handicapped, such as scree...
Architecture of a single-page JavaScript web application?
... away the JS library, leaving door open to change mind on what you use, or mix & match should the need arise.
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How to generate a number of most distinctive colors in R?
...lettes are supposed to provide X most distinctive colours each. Of course, mixing them joins into one palette also similar colours, but that's the best I can get (74 colors).
library(RColorBrewer)
n <- 60
qual_col_pals = brewer.pal.info[brewer.pal.info$category == 'qual',]
col_vector = unlist(ma...
how to programmatically fake a touch event to a UIButton?
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It turns out that
[buttonObj sendActionsForControlEvents: UIControlEventTouchUpInside];
got me exactly what I needed, in this case.
EDIT: Don't forget to do this in the main thread, to get results similar to a user-press.
For Swift 3:
buttonObj.sendActio...
How to preview git-pull without doing fetch?
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Are you looking for git reset --soft or --mixed? Check the manpage.
– Aristotle Pagaltzis
Oct 19 '08 at 0:22
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