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How to convert a string to lower case in Bash?
...cho "$a" | awk '{print tolower($0)}'
hi all
Non-POSIX
You may run into portability issues with the following examples:
Bash 4.0
$ echo "${a,,}"
hi all
sed
$ echo "$a" | sed -e 's/\(.*\)/\L\1/'
hi all
# this also works:
$ sed -e 's/\(.*\)/\L\1/' <<< "$a"
hi all
Perl
$ echo "$a" | ...
When to use the different log levels
There are different ways to log messages, in order of fatality:
18 Answers
18
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Group vs role (Any real difference?)
...al difference between group and role? I've been trying to figure this out for some time now and the more information I read, the more I get the sense that this is brought up just to confuse people and there is no real difference. Both can do the other's job. I've always used a group to manage users ...
What's the difference between “Layers” and “Tiers”?
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Logical layers are merely a way of
organizing your code. Typical layers
include Presentation, Business and
Data – the same as the traditional
3-tier model. But when we’re talking
about layers, we’re only talking about
logical organization of co...
Should I choose ActivePerl or Strawberry Perl for Windows? [duplicate]
...ut I'd like to try it out. I read about two rival distributions available for Windows platform (I guess there's just Perl on other OSes :).
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Span inside anchor or anchor inside span or doesn't matter?
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BUT, I tend to only use a <span> inside an <a> if it's only for a part of the contents of the tag i.e.
<a href="#">some <span class="red">text</span></a>
Rather than:
<a href="#"><span class="red">some text</span></a>
Which should o...
Android Min SDK Version vs. Target SDK Version
When it comes to developing applications for Android, what is the difference between Min and Target SDK version? Eclipse won't let me create a new project unless Min and Target versions are the same!
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Reminder - \r\n or \n\r?
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I'd use the word 'return' to remember, the r comes before the n.
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Decimal number regular expression, where digit after decimal is optional
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Use the following:
/^\d*\.?\d*$/
^ - Beginning of the line;
\d* - 0 or more digits;
\.? - An optional dot (escaped, because in regex, . is a special character);
\d* - 0 or more digits (the decimal part);
$ - End of the line.
This allows for .5 decimal rather than requiring the leading zero,...
How do I resolve git saying “Commit your changes or stash them before you can merge”?
I made some updates on my local machine, pushed them to a remote repository, and now I'm trying to pull the changes to the server and I get the message;
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