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TypeError: unhashable type: 'dict'
...ntation of it like this:
>>> key = frozenset(dict_key.items())
Now you may use key as a key in a dict or set:
>>> some_dict[key] = True
>>> some_dict
{frozenset([('a', 'b')]): True}
Of course you need to repeat the exercise whenever you want to look up something usin...
How to backup a local Git repository?
... + directory
else unless $?.exitstatus == 0 then raise( 'fatal: unknown exit status from git-config: ' + $?.exitstatus ) end
end
# verify directory exists
unless File::directory?( directory )
raise( 'fatal: backup directory does not exists: ' + directory )
end
# The date and time p...
How to inject dependencies into a self-instantiated object in Spring?
...yBean obj = new MyBean();
beanFactory.autowireBean(obj);
// obj will now have its dependencies autowired.
}
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Mipmap drawables for icons
Since Android 4.3 (Jelly Bean) we can now make use of the res/mipmap folders to store "mipmap" images.
11 Answers
...
Does a const reference class member prolong the life of a temporary?
...x(temp);
cout << sandbox.member << endl;
return 0;
}
Now temp will pass out of scope at the end of main() instead of at the end of the constructor. However, this is bad practice. Your member variable should never be a reference to a variable that exists outside of the instance....
How do I check if a string contains a specific word?
...s "falsey", we can't use simpler constructs like !strpos($a, 'are').
Edit:
Now with PHP 8 you can do this:
if (str_contains('How are you', 'are')) {
echo 'true';
}
RFC
str_contains
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Assign multiple columns using := in data.table, by group
...
This now works in v1.8.3 on R-Forge. Thanks for highlighting it!
x <- data.table(a = 1:3, b = 1:6)
f <- function(x) {list("hi", "hello")}
x[ , c("col1", "col2") := f(), by = a][]
# a b col1 col2
# 1: 1 1 hi hello
# ...
How to open every file in a folder?
... print "No files found here!"
print "Total files found:\t", counter
Now you have not only listed all the files in a folder but also have them (optionally) sorted by starting name, file type and others. Just now iterate over each list and do your stuff.
...
Is Java “pass-by-reference” or “pass-by-value”?
...one at address 74) is asked to change his name to Rowlf
then, we return
Now let's think about what happens outside the method:
Did myDog change?
There's the key.
Keeping in mind that myDog is a pointer, and not an actual Dog, the answer is NO. myDog still has the value 42; it's still pointing ...
Why does git revert complain about a missing -m option?
...you want to throw away the merge commit:
$ git reset --hard HEAD^
HEAD is now at b7e7176 baz
$ git lola
* b7e7176 (HEAD, master) baz
| * c7256de (otherguy) bar
|/
* 9968f79 foo
As documented in the git rev-parse manual
<rev>^, e.g. HEAD^, v1.5.1^0
A suffix ^ to a revision parameter ...