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How do I remove duplicate items from an array in Perl?
...ou can do something like this as demonstrated in perlfaq4:
sub uniq {
my %seen;
grep !$seen{$_}++, @_;
}
my @array = qw(one two three two three);
my @filtered = uniq(@array);
print "@filtered\n";
Outputs:
one two three
If you want to use a module, try the uniq function from List::Mor...
How do I make a list of data frames?
...3), y2 = c(4, 5, 6))
d2 <- data.frame(y1 = c(3, 2, 1), y2 = c(6, 5, 4))
my.list <- list(d1, d2)
You access the data frames just like you would access any other list element:
my.list[[1]]
# y1 y2
# 1 1 4
# 2 2 5
# 3 3 6
...
How to check if a string contains a substring in Bash
...cards) outside a case statement, too, if you use double brackets:
string='My long string'
if [[ $string == *"My long"* ]]; then
echo "It's there!"
fi
Note that spaces in the needle string need to be placed between double quotes, and the * wildcards should be outside. Also note that a simple com...
BaseException.message deprecated in Python 2.6
... pass the message as the first parameter to the constructor
Example:
class MyException(Exception):
"""My documentation"""
try:
raise MyException('my detailed description')
except MyException as my:
print my # outputs 'my detailed description'
You can use str(my) or (less elegant) my.ar...
Git/GitHub can't push to master
...ays, if you want to push, you should use either the SSH URL git@github.com:my_user_name/my_repo.git or the "smart HTTP" protocol by using the https:// URL that GitHub shows you for your repository.
(Update: to my surprise, some people apparently thought that by this I was suggesting that "https" me...
Why is my git repository so big?
...ted remote ref, branches and tags I still had 1.4GB (!) of wasted space in my repository. I was only able to get rid of this by cloning it with git clone file:///path/to/repository. Note that the file:// makes a world of difference when cloning a local repository - only the referenced objects are ...
MySQL Server has gone away when importing large sql file
I tried to import a large sql file through phpMyAdmin...But it kept showing error
19 Answers
...
Mercurial move changes to a new branch
I have a number of changes that I committed to my local repository, but have not yet been pushed. Since on a feature is taking longer than expected, I want to swap these changes onto a named branch before I push. How can I do this?
...
What happens to my apps after my developer account membership expires? [closed]
When my paid developer membership runs out with Apple, what happens to my existing apps on the app store?
5 Answers
...
Android device chooser - My device seems offline
I have developed an application and i was planning to deploy it to my HTC Desire.
I have installed USB driver. I turned on USB debugging on the phone and choosed charge only when phone plugged-in. When I run application Android device chooser show my device offline.
I am stuck at this point. Any hel...