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Grep only the first match and stop
...any given file. But it will still continue to search in other files. Also, if there are two or more matched in the same line, all of them will be displayed.
You can use head -1 to solve this problem:
grep -o -a -m 1 -h -r "Pulsanti Operietur" /path/to/dir | head -1
explanation of each grep optio...
Qt: How do I handle the event of the user pressing the 'X' (close) button?
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If you have a QMainWindow you can override closeEvent method.
#include <QCloseEvent>
void MainWindow::closeEvent (QCloseEvent *event)
{
QMessageBox::StandardButton resBtn = QMessageBox::question( this, APP_NAME,
...
How to debug stream().map(…) with lambda expressions?
... lambdas also works well with NetBeans. I'm using NetBeans 8 and JDK 8u5.
If you set a breakpoint on a line where there's a lambda, you actually will hit once when the pipeline is set up, and then once for each stream element. Using your example, the first time you hit the breakpoint will be the ma...
Open popup and refresh parent page on close popup
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If you don't control JavaScript on the child page (e.g. OAuth flow) then you will need to check popupWindow.closed using setInterval like in @Zuul's solution.
– jchook
May 11 '16 at 18:1...
How to display multiple notifications in android
I am receiving only one notification and if there comes another notification, it replaces the previous one and here is my code
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Why is document.write considered a “bad practice”?
...ument.write (henceforth DW) does not work in XHTML
DW does not directly modify the DOM, preventing further manipulation (trying to find evidence of this, but it's at best situational)
DW executed after the page has finished loading will overwrite the page, or write a new page, or not work
DW execute...
SQL variable to hold list of integers
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What if you don't know what the IDs are and that comes from a query? Example: SET @AddressIDs = (SELECT ID FROM address WHERE Account = 1234) This query will return multiple IDs and I get an error saying the subquery returned more...
Why do we need the “event” keyword while defining events?
...s and public fields of delegate types look similar, but are actually very different.
An event is fundamentally like a property - it's a pair of add/remove methods (instead of the get/set of a property). When you declare a field-like event (i.e. one where you don't specify the add/remove bits yourse...
What is a “cache-friendly” code?
What is the difference between " cache unfriendly code " and the " cache friendly " code?
9 Answers
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How to calculate date difference in JavaScript?
I want to calculate date difference in days, hours, minutes, seconds, milliseconds, nanoseconds. How can I do it?
18 Answer...