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Using only CSS, show div on hover over
I would like to show a div when someone hovers over an <a> element, but I would like to do this in CSS and not JavaScript. Do you know how this can be achieved?
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Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign
...d by one of the following
null values being returned for columns not set to AllowDBNull
duplicate rows being returned with the same primary key.
a mismatch in column definition (e.g. size of char fields) between the database and the dataset
Try running your query natively and look at the results...
How to exclude a module from a Maven reactor build?
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The easiest might be to use profiles like this:
<project>
...
<modules>
<module>common</module>
<module>foo</module>
<module>bar</module>
<modules>
...
<profiles>
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Measure elapsed time in Swift
...n we measure the time elapsed for running a function in Swift? I am trying to display the elapsed time like this: "Elapsed time is .05 seconds". Saw that in Java , we can use System.nanoTime(), is there any equivalent methods are available in Swift to accomplish this?
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How to use sed to replace only the first occurrence in a file?
I would like to update a large number of C++ source files with an extra include directive before any existing #includes. For this sort of task, I normally use a small bash script with sed to re-write the file.
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Why not abstract fields?
...ng a final field in your abstract class that is initialised in its constructor (untested code):
abstract class Base {
final String errMsg;
Base(String msg) {
errMsg = msg;
}
abstract String doSomething();
}
class Sub extends Base {
Sub() {
super("Sub message...
Why use bzero over memset?
In a Systems Programming class I took this previous semester, we had to implement a basic client/server in C. When initializing the structs, like sock_addr_in , or char buffers (that we used to send data back and forth between client and server) the professor instructed us to only use bzero and ...
Java NIO FileChannel versus FileOutputstream performance / usefulness
I am trying to figure out if there is any difference in performance (or advantages) when we use nio FileChannel versus normal FileInputStream/FileOuputStream to read and write files to filesystem. I observed that on my machine both perform at the same level, also many times the FileChannel way...
Which is better option to use for dividing an integer number by 2?
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Use the operation that best describes what you are trying to do.
If you are treating the number as a sequence of bits, use bitshift.
If you are treating it as a numerical value, use division.
Note that they are not exactly equivalent. They can give different results for negative...
How do you fade in/out a background color using jquery?
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This exact functionality (3 second glow to highlight a message) is implemented in the jQuery UI as the highlight effect
https://api.jqueryui.com/highlight-effect/
Color and duration are variable
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