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Which annotation should I use: @IdClass or @EmbeddedId
... for @IdClass even though I prefer @EmbeddedId in most situations (Got to know this from a session by Antonio Goncalves .What he suggested is we could use the @IdClass in case the composite key class is not accessible or comes in from another module or legacy code where we can't add a annotation .In...
Accessing attributes from an AngularJS directive
...
URL is now changed to docs.angularjs.org/api/ng/service/$compile#Attributes
– bhatiaravi
Mar 25 '14 at 12:49
...
How can I replace text with CSS?
...;
button {
background-color: green;
color: black;
padding: 5px;
}
Now let's hide the original element, but add another block element afterwards:
button {
visibility: hidden;
}
button:after {
content:'goodbye';
visibility: visible;
display: block;
position: absolute;
background...
Why do you create a View in a database?
...pected cost of fixing it later is more than the definite cost of fixing it now.
– Mr. Boy
Feb 8 '10 at 9:19
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show 7 more comments
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Is there a way to simulate the C++ 'friend' concept in Java?
...real so that the runtime will throw a NullPointerException if it is null.
Now boys :
package montague;
import capulet.Juliet;
public class Romeo {
public static final class Love { private Love() {} }
private static final Love love = new Love();
public static void cuddleJuliet() {
...
What is the difference between memoization and dynamic programming?
...recurses down to solve the sub-problems).
A good slide from here (link is now dead, slide is still good though):
If all subproblems must be solved at least once, a bottom-up dynamic-programming algorithm usually outperforms a top-down memoized algorithm by a constant factor
No overhe...
How to concatenate string variables in Bash
...aces, tabulations and/or newlines
printf -v foo "%s World" "$foo"
Shell now
Under POSIX shell, you could not use bashisms, so there is no builtin printf.
Basically
But you could simply do:
foo="Hello"
foo="$foo World"
echo $foo
Hello World
Formatted, using forked printf
If you want to use ...
if arguments is equal to this string, define a variable like this string
I am doing some bash script and now I got one variable call source and one array called samples , like this:
3 Answers
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How to get ID of the last updated row in MySQL?
...DATE table SET id=LAST_INSERT_ID(id), row='value' WHERE other_row='blah';. Now, SELECT LAST_INSERT_ID(); will return the updated id. See newtover's answer for more details.
– Joel
Jun 2 '14 at 14:35
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Is it possible to “await yield return DoSomethingAsync()”
...erators as implemented with yield are a blocking construct, so as of right now await and yield are incompatible.
Long Because iterating over an IEnumerable is a blocking operation, calling a method marked as async will still execute it in a blocking manner, since it has to wait for that operation t...