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Test if a property is available on a dynamic variable
...rySimilarButNotTheSame();
try
{
var x = myVariable.MyProperty;
// do stuff with x
}
catch (RuntimeBinderException)
{
// MyProperty doesn't exist
}
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What makes Scala's operator overloading “good”, but C++'s “bad”?
..., for instance, get a pointer to that + function.
Scala on the other hand doesn't have operators in that way. It just has great flexibility in defining method names plus a bit of built in precedence for non-word symbols. So technically Scala doesn't have operator overloading.
Whatever you want t...
Display number with leading zeros
...
In Python 2 (and Python 3) you can do:
print "%02d" % (1,)
Basically % is like printf or sprintf (see docs).
For Python 3.+, the same behavior can also be achieved with format:
print("{:02d}".format(1))
For Python 3.6+ the same behavior can be achie...
Java: Detect duplicates in ArrayList?
...u want to detect if any row of them has duplicates?
In that case, I could do the following, assuming that Block implements "equals" and "hashCode" correctly:
for (Block[] row : table) {
Set set = new HashSet<Block>();
for (Block cell : row) {
set.add(cell);
}
if (set.size(...
autolayout - make height of view relative to half superview height
...ccepted answer was written this method was not available. Sometimes askers do not revisit old questions or care to change the accepted answer. But ultimately I am just here to help out, glad it did!
– Firo
Sep 13 '14 at 19:46
...
How do I get logs/details of ansible-playbook module executions?
...pass the -v flag to ansible-playbook on the command line, you'll see the stdout and stderr for each task executed:
$ ansible-playbook -v playbook.yaml
Ansible also has built-in support for logging. Add the following lines to your ansible configuration file:
[defaults]
log_path=/path/to/logfile
...
How to do SELECT COUNT(*) GROUP BY and ORDER BY in Django?
...
According to the documentation, you should use:
from django.db.models import Count
Transaction.objects.all().values('actor').annotate(total=Count('actor')).order_by('total')
values() : specifies which columns are going to be used to "group b...
Why is Dictionary preferred over Hashtable in C#?
...t's worth, a Dictionary is (conceptually) a hash table.
If you meant "why do we use the Dictionary<TKey, TValue> class instead of the Hashtable class?", then it's an easy answer: Dictionary<TKey, TValue> is a generic type, Hashtable is not. That means you get type safety with Dictionary...
How to completely remove a dialog on close
...sed I would like to completely destroy and remove the div again. How can I do this? My code looks something like this at the moment:
...
How to set MSDN to be always in English
...ike explained here. In your case change cz-cz to en-us.
Or better, let it do a browser plugin like Redirector for firefox:
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