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How to solve java.lang.NoClassDefFoundError?
...member that the classloader (specifically java.net.URLClassLoader) will look for classes in package a.b.c in folder a/b/c/ in each entry in your classpath. NoClassDefFoundError can also indicate that you're missing a transitive dependency of a .jar file that you've compiled against and you're trying...
Remove blue border from css custom-styled button in Chrome
I'm working on a web page, and I want custom-styled <button> tags. So with CSS, I said: border: none . Now it works perfectly in safari, but in chrome, when I click one of the buttons, it puts an annoying blue border around it. I thought button:active { outline: none } or button:focus { ...
How to check which locks are held on a table
How can we check which database locks are applied on which rows against a query batch?
6 Answers
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How can I pass a parameter to a setTimeout() callback?
I have some JavaScript code that looks like:
28 Answers
28
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Why does .NET foreach loop throw NullRefException when collection is null?
...o this situation... where Do.Something(...) returns a null collection, like so:
11 Answers
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How do I run a shell script without using “sh” or “bash” commands?
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Add a "shebang" at the top of your file:
#!/bin/bash
And make your file executable (chmod +x script.sh).
Finally, modify your path to add the directory where your script is located:
export PATH=$PATH:/appropriate/directory
(typically, you want $HOME/bin for storing your own scrip...
How can I remove duplicate rows?
...OUP BY the unique columns, and SELECT the MIN (or MAX) RowId as the row to keep. Then, just delete everything that didn't have a row id:
DELETE FROM MyTable
LEFT OUTER JOIN (
SELECT MIN(RowId) as RowId, Col1, Col2, Col3
FROM MyTable
GROUP BY Col1, Col2, Col3
) as KeepRows ON
MyTable.R...
How to add default value for html ? [closed]
... read from a material that to add default value you have to do something like <textarea>This is default text</textarea> . I did that but it doesn't work. What's the right thing to do?
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Java Date vs Calendar
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Date is a simpler class and is mainly there for backward compatibility reasons. If you need to set particular dates or do date arithmetic, use a Calendar. Calendars also handle localization. The previous date manipulation functions of Date have since been deprecated.
Persona...
Can I escape a double quote in a verbatim string literal?
In a verbatim string literal (@"foo") in C#, backslashes aren't treated as escapes, so doing \" to get a double quote doesn't work. Is there any way to get a double quote in a verbatim string literal?
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