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Checking for the correct number of arguments
How do i check for the correct number of arguments (one argument). If somebody tries to invoke the script without passing in the correct number of arguments, and checking to make sure the command line argument actually exists and is a directory.
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Is there ever a time where using a database 1:1 relationship makes sense?
...easons in the physical schema, but it can happen in the logic side as well if a large chunk of the data is expected to be "unknown" at the same time (in which case you have a 1:0 or 1:1, but no more).
As an example of a logical partition: you have data about an employee, but there is a larger set o...
Rebasing a branch including all its children
..." command output a star before the current branch, screwing up this script if one of the branches to rebase is currently checked out?
– Mark Lodato
Dec 20 '12 at 21:38
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“Comparison method violates its general contract!”
...ce A > B and B > C, then it must be the case that A > C. However, if your comparator is invoked on A and C, it would return zero, meaning A == C. This violates the contract and hence throws the exception.
It's rather nice of the library to detect this and let you know, rather than behave e...
How to find gaps in sequential numbering in mysql?
...roblem with this, is that it doesn't "report" a possible initial gap. e.g. if the first 5 ids are missing (1 through 5) it doesn't show that... How could we show pissible gaps at the very begining?
– DiegoDD
Apr 12 '13 at 21:32
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Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
... was working on to programmatically lighten or darken a hex color by a specific amount. Just pass in a string like "3F6D2A" for the color ( col ) and a base10 integer ( amt ) for the amount to lighten or darken. To darken, pass in a negative number (i.e. -20 ).
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How to calculate number of days between two given dates?
If I have two dates (ex. '8/18/2008' and '9/26/2008' ), what is the best way to get the number of days between these two dates?
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Array.push() if does not exist?
How can I push into an array if neither values exist? Here is my array:
23 Answers
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Using parameters in batch files at Windows command line
...r tokens that you can use:
%0 is the executable (batch file) name as specified in the command line.
%* is all parameters specified in the command line -- this is very useful if you want to forward the parameters to another program.
There are also lots of important techniques to be aware of in ad...
Is there a way to detect if an image is blurry?
I was wondering if there is a way to determine if an image is blurry or not by analyzing the image data.
12 Answers
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