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Null check in an enhanced for loop
...mpty list won't fail.
If you get this list from somewhere else and don't know if it is ok or not you could create a utility method and use it like this:
for( Object o : safe( list ) ) {
// do whatever
}
And of course safe would be:
public static List safe( List other ) {
return other =...
How do I get the 'clear' command in Cygwin?
...
@AndrewProck It seems to be there now!
– Rohaq
Dec 20 '13 at 17:42
Thanks for...
Can I make 'git diff' only the line numbers AND changed file names?
...ed file $@, can't show you line numbers"; exit 1;;
7) ;;
*) echo "I don't know what to do, help!"; exit 1;;
esac
path=$1
old_file=$2
old_hex=$3
old_mode=$4
new_file=$5
new_hex=$6
new_mode=$7
printf '%s: ' $path
diff $old_file $new_file | grep -v '^[<>-]'
For details on "external diff" see ...
How do I perform a Perl substitution on a string while keeping the original?
...tion is more useful as a shibboleth than good code; good Perl coders will know it and understand it, but it's much less transparent and readable than the two-line copy-and-modify couplet you're starting with.
In other words, a good way to do this is the way you're already doing it. Unnecessary con...
Convert Unix timestamp into human readable date using MySQL
...p into a human readable date? I have one field where I save Unix times and now I want to add another field for human readable dates.
...
How to run Rake tasks from within Rake tasks?
...reenable a build-task that is parametrized with a global variable, because now the different builds have different tasks. the codereuse of the build-task is done by reusing the code to define the build-tasks. see how the loop does not execute the same task twice, but instead created tasks, that can ...
Where's my JSON data in my incoming Django request?
...
request.raw_response is now deprecated. Use request.body instead to process non-conventional form data such as XML payloads, binary images, etc.
Django documentation on the issue.
...
When should I use nil and NULL in Objective-C?
...
This accepted answer fails to acknowledge that [NSNull null] is a very different beast. To quote from NSNull Class Reference, "The NSNull class defines a singleton object used to represent null values in collection objects (which don’t allow nil values)." ...
How can I suppress all output from a command using Bash?
... different so that all output is redirected regardless of your example? I know screen and script can do something like that but both are finicky and vary from *nix to *nix.
– Brent
Nov 25 '14 at 20:50
...
[ :Unexpected operator in shell programming [duplicate]
... This answer is partially wrong. The fully correct one is the now top-voted by Nietzche-jou. sh supports [. == works in Bash built-ins [[, test and [ while a single = is required by POSIX version of [ and test. (Bash manual says the same, BTW.) Requiring Bash because of this is needless...