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Java project in Eclipse: The type java.lang.Object cannot be resolved. It is indirectly referenced f
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This is an annoying Eclipse Bug which seems to bite now and then. See http://dev-answers.blogspot.de/2009/06/eclipse-build-errors-javalangobject.html for a possible solution, otherwise try the following;
Close the project and reopen it.
Clean the project (It will rebuild...
Is there a way to create multiline comments in Python?
...-line comments, and this is also what you'll find in many projects. Text editors usually have a shortcut to do this easily.
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MySQL: Large VARCHAR vs. TEXT?
...ssage types (all integer types) I need to save the actual message text as either VARCHAR or TEXT. I'm setting a front-end limit of 3000 characters which means the messages would never be inserted into the db as longer than this.
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How to create a Menubar application for Mac
EDIT: This is a nice ready-made menubar application here ( github source ) by this answer .
6 Answers
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How do I properly clean up Excel interop objects?
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Excel does not quit because your application is still holding references to COM objects.
I guess you're invoking at least one member of a COM object without assigning it to a variable.
For me it was the excelApp.Worksheets object which I di...
Create a hexadecimal colour based on a string with JavaScript
...generate a hexadecimal value between #000000 and #FFFFFF , so I can use it as a colour for a HTML element.
13 Answers
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Gulps gulp.watch not triggered for new or deleted files?
The following Gulpjs task works fine when editing files in the glob match:
7 Answers
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Why are C character literals ints instead of chars?
In C++, sizeof('a') == sizeof(char) == 1 . This makes intuitive sense, since 'a' is a character literal, and sizeof(char) == 1 as defined by the standard.
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Test if remote TCP port is open from a shell script
...inted by B. Rhodes, nc (netcat) will do the job. A more compact way to use it:
nc -z <host> <port>
That way nc will only check if the port is open, exiting with 0 on success, 1 on failure.
For a quick interactive check (with a 5 seconds timeout):
nc -z -v -w5 <host> <port>
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How do you round a floating point number in Perl?
...t int() merely truncates toward 0. For rounding to a certain number of digits, sprintf() or printf() is usually the easiest
route.
printf("%.3f", 3.1415926535); # prints 3.142
The POSIX module (part of the standard Perl distribution) implements
ceil(), floor(), and a number of other ma...