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How do I properly clean up Excel interop objects?
...App.Worksheets.Open(...);
...
Marshal.ReleaseComObject(sheet);
I didn't know that internally C# created a wrapper for the Worksheets COM object which didn't get released by my code (because I wasn't aware of it) and was the cause why Excel was not unloaded.
I found the solution to my problem on t...
Secure hash and salt for PHP passwords
...that MD5 is partially unsafe. Taking this into consideration, I'd like to know which mechanism to use for password protection.
...
A KeyValuePair in Java [duplicate]
...d programmers could use BasicNameValuePair
Update:
BasicNameValuePair is now deprecated (API 22).
Use Pair instead.
Example usage:
Pair<Integer, String> simplePair = new Pair<>(42, "Second");
Integer first = simplePair.first; // 42
String second = simplePair.second; // "Second"
...
In MySQL, how to copy the content of one table to another table within the same database?
...at w3school page is for a different SQL, not intended for MySQL. w3schools now has error reporting, if you find issues report it on their site to assist with accurate knowledge.
– Nightwolf
Sep 27 '17 at 10:50
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Python 2.7 getting user input and manipulating as string without quotations
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Although for anyone reading this using Python 3, input now works this way, and raw_input is gone.
– Thomas K
Feb 10 '11 at 17:35
4
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PHP Fatal error: Cannot redeclare class
Does anyone know what can cause this problem?
18 Answers
18
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Is the Scala 2.8 collections library a case of “the longest suicide note in history”? [closed]
...s even if the set is empty, so the function is never applied! As far as I know there is no other collection framework with an equivalent functionality. Yet from a user perspective this is how things are supposed to work.
The problem we have is that all the clever technology that makes this happen l...
Convert boolean result into number/integer
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Interestingly, the ternary is now fastest in Chrome 64.0.3282 on macOS 10.13.3.
– 2540625
Feb 13 '18 at 23:49
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How to format a Java string with leading zero?
...g.format("%0"+ (9 - "Apple".length() )+"d%s",0 ,"Apple").substring(0,8); . Now you wont have this exception.
– Abhinav Puri
Jan 8 '17 at 7:25
1
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Which is more preferable to use: lambda functions or nested functions ('def')?
...lt;lambda>'
Lambdas are anonymous functions, after all, so they don't know their own name.
>>> l.__name__
'<lambda>'
>>> foo.__name__
'foo'
Thus lambda's can't be looked up programmatically in their namespace.
This limits certain things. For example, foo can be looked...