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SQL keys, MUL vs PRI vs UNI
What is the difference between MUL , PRI and UNI in MySQL?
4 Answers
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SQL UPDATE all values in a field with appended string CONCAT not working
...----+-------+
| id | data |
+------+-------+
| 1 | max |
| 2 | linda |
| 3 | sam |
| 4 | henry |
+------+-------+
4 rows in set (0.02 sec)
mysql> update t set data=concat(data, 'a');
Query OK, 4 rows affected (0.01 sec)
Rows matched: 4 Changed: 4 Warnings: 0
mysql> selec...
WebDriver: check if an element exists? [duplicate]
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You could alternatively do:
driver.findElements( By.id("...") ).size() != 0
Which saves the nasty try/catch
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Undoing a 'git push'
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You need to make sure that no other users of this repository are fetching the incorrect changes or trying to build on top of the commits that you want removed because you are about to rewind history.
Then you need to 'force' push the old reference.
git push -f origin last_known_good_commit:br...
How to send parameters from a notification-click to an activity?
I can find a way to send parameters to my activity from my notification.
13 Answers
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Do SVG docs support custom data- attributes?
In HTML5, elements can have arbitrary metadata stored in XML attributes whose names start with data- such as <p data-myid="123456"> . Is this part of the SVG spec too?
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Node.js + Express: Routes vs controller
New to Node.js and Express, I am trying to understand the two seems overlapping concepts, routes vs controller.
2 Answers
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How to make child process die after parent exits?
...atever reason (normally or abnormally, by kill, ^C, assert failure or anything else) I want the child process to die. How to do that correctly?
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Insert, on duplicate update in PostgreSQL?
...d from an answer on Stack Overflow how to perform multiple updates at once in MySQL using the following syntax:
16 Answers
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How to draw rounded rectangle in Android UI?
I need to draw a rounded rectangle in the Android UI. Having the same rounded rectangle for TextView and EditText would also be helpful.
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