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PersistentObjectException: detached entity passed to persist thrown by JPA and Hibernate
...etters in both sides of the bidirectional relationship. An example setter for the One side is in this link.
An example setter for the Many side is in this link.
After you correct your setters you want to declare the Entity access type to be "Property". Best practice to declare "Property" access ty...
How to add target=“_blank” to JavaScript window.location?
...nt window. To open a new window, you need to use window.open. This should work:
function ToKey(){
var key = document.tokey.key.value.toLowerCase();
if (key == "smk") {
window.open('http://www.smkproduction.eu5.org', '_blank');
} else {
alert("Kodi nuk është valid!");
...
Check if a program exists from a Makefile
... to fail early if a required executable is not in PATH rather than to run for a possibly long time before failing.
The excellent solution provided by engineerchuan requires making a target. However, if you have many executables to test and your Makefile has many independent targets, each of which r...
Is there a bash command which counts files?
...
This simple one-liner should work in any shell, not just bash:
ls -1q log* | wc -l
ls -1q will give you one line per file, even if they contain whitespace or special characters such as newlines.
The output is piped to wc -l, which counts the number of...
Should private helper methods be static if they can be static
...
One of my favorite threads.I am using NetBeans and it shows static method calls with italic fonts.
– skiabox
Jun 28 '12 at 12:24
...
How does libuv compare to Boost/ASIO?
...
Scope
Boost.Asio is a C++ library that started with a focus on networking, but its asynchronous I/O capabilities have been extended to other resources. Additionally, with Boost.Asio being part of the Boost libraries, its scope is slightly narrowed to prevent duplication with other Boost lib...
How to set a Timer in Java?
How to set a Timer, say for 2 minutes, to try to connect to a Database then throw exception if there is any issue in connection?
...
How to remove text from a string?
...".replace('data-','');
console.log(ret); //prints: 123
Docs.
For all occurrences to be discarded use:
var ret = "data-123".replace(/data-/g,'');
PS: The replace function returns a new string and leaves the original string unchanged, so use the function return value after the replace(...
Is it possible to set transparency in CSS3 box-shadow?
...
I suppose rgba() would work here. After all, browser support for both box-shadow and rgba() is roughly the same.
/* 50% black box shadow */
box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.5);
div {
width: 200px;
height: 50px;
line-h...
How to get all possible combinations of a list’s elements?
...from
the input iterable.
Combinations are emitted in lexicographic sort order. So, if the
input iterable is sorted, the
combination tuples will be produced in
sorted order.
Since 2.6, batteries are included!
s...