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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" | ...
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”?
...
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...
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!
...
What's the best way of scraping data from a website? [closed]
...ut the application doesn’t provide any application programming interface or another mechanism to access that data programmatically.
...
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 :).
...
What is a higher kinded type in Scala?
...
Let me make up for starting some of this confusion by pitching in with some disambiguation. I like to use the analogy to the value level to explain this, as people tend to be more familiar with it.
A type constructor is a type that you can...
Span inside anchor or anchor inside span or doesn't matter?
...
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...
Reminder - \r\n or \n\r?
...
I'd use the word 'return' to remember, the r comes before the n.
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Func vs. Action vs. Predicate [duplicate]
...ction is simply whether you want the delegate to return a value (use Func) or not (use Action).
Func is probably most commonly used in LINQ - for example in projections:
list.Select(x => x.SomeProperty)
or filtering:
list.Where(x => x.SomeValue == someOtherValue)
or key selection:
l...