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Difference between validate(), revalidate() and invalidate() in Swing GUI
...t seems like the scenarios presented above can give a bit of a hint, as to what happens when using invalidate().
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What is the difference between Reader and InputStream?
What is the difference between Reader and InputStream?
And when to use what?
If I can use Reader for reading characters why I will use inputstream, I guess to read objects?
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What exactly do “IB” and “UB” mean?
...ided if you care about portability. A particular implementation can define what happens for specific undefined behavior, and in some cases (especially device drivers and smaller embedded systems) you need to use those things.
– Jerry Coffin
May 4 '10 at 15:53
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Cannot push to Heroku because key fingerprint
...ts. The first one had added my default SSH key for my machine. No matter what I did trying to fix my second account, it would not take until I removed my default key from the first account. SSH-AGENT will send the first key by default, causing this problem. The fix is to create specific keys for...
What guidelines for HTML email design are there? [closed]
What guidelines can you give for rich HTML formatting in emails while maintaining good visual stability across many clients and web based email interfaces?
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What do the return values of node.js process.memoryUsage() stand for?
...or future allocations, but is any of it ever released (if not being used)? What would cause it to stay high?
– logidelic
Sep 28 '18 at 14:15
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ConnectionTimeout versus SocketTimeout
...meout only comes into picture when a Connection is already established? 2. What if there is no data flow for like say 5 mins after the 3 packets have been received? Will there be a SocketTimeout exception after the 3rd packet has been received?
– Saurabh Patil
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What does the PHP error message “Notice: Use of undefined constant” mean?
...could be a constant.
Strings missing quotes: $my_array[bad_key]
This is what the problem is in your case, and it's because you've got string array keys that haven't been quoted. Fixing the string keys will fix the bug:
Change:
$department = mysql_real_escape_string($_POST[department]);
...(etc...
Pycharm does not show plot
... It's really amazing - this worked for me, and none of the others did. What was surprising is, I didn't need plt.show() in Jupyter Notebook, dunno why the behavior is different in PyCharm
– Ambareesh
Jan 24 '19 at 5:08
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What is the benefit of using $() instead of backticks in shell scripts?
... some form of escaping will work on the backticks.
An example, though somewhat contrived:
deps=$(find /dir -name $(ls -1tr 201112[0-9][0-9]*.txt | tail -1l) -print)
which will give you a list of all files in the /dir directory tree which have the same name as the earliest dated text file from De...