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How to map with index in Ruby?
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the call to #index means this is now an O(N^2) loop also why the +2 ? :)
– rogerdpack
Mar 13 '17 at 16:40
2
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Change cursor to hand when mouse goes over a row in table
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@Hooli as of 6-2018 this is post is now the top result when searching "bootstrap change icon to pointer on hover."
– BrianHVB
Jun 5 '18 at 17:51
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Is file append atomic in UNIX?
...pretaion is correct then of course the different records may be mixed. But now that I'm rereading Bastien's quote, I think it must mean that nobody can interrupt "during the write" - otherwise the entire paragraph in the standard would be useless, providing literally no guarantees at all (not even t...
Get keys from HashMap in Java
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This is doable, at least in theory, if you know the index:
System.out.println(team1.keySet().toArray()[0]);
keySet() returns a set, so you convert the set to an array.
The problem, of course, is that a set doesn't promise to keep your order. If you only have one...
The 'json' native gem requires installed build tools
... 1.9.2p180 (2011-02-18) [i386-mingw32] installed on my windows 7 machine. Now I tried to install the JSON gem using the command, "gem install json" and got the following error.
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XAMPP - Port 80 in use by “Unable to open process” with PID 4! 12
...change the "Listen 80" line to "Listen 8080". Save the file and close it.
Now it avoids Port 80 and uses Port 8080 instead without issue. The only additional thing you need to do is make sure to put localhost:8080 in the browser so the browser knows to look on Port 8080. Otherwise it defaults to Po...
Javascript infamous Loop issue? [duplicate]
...UNDERSTAND THIS AND YOU ARE HOME AND DRY (took me 2 years)!
// Now the click event is expecting a function as a handler so return it
return function() { alert (num) }
}(i) // We call the function here, passing in i
)
}
SIMPLE TO UNDERSTAND ALTERNATIVE
If you ca...
Chaining multiple filter() in Django, is this a bug?
...__event=event) & Q(shiftregistrations__shifts=False)
What you can do now is to use an annotation count-filter.
In this case we count all shifts which belongs to a certain event.
qs: EventQuerySet = qs.annotate(
num_shifts=Count('shiftregistrations__shifts', filter=Q(shiftregistrations__e...
Exploring Docker container's file system
...owing:
hash=$(docker run busybox)
cd /var/lib/docker/aufs/mnt/$hash
And now the current working directory is the root of the container.
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In Django, how do I check if a user is in a certain group?
...ming, there is one initial user
user.groups.add(group) # user is now in the "Editor" group
then user.groups.all() returns [<Group: Editor>].
Alternatively, and more directly, you can check if a a user is in a group by:
if django_user.groups.filter(name = groupname).exists():
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