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What does yield mean in PHP?
... echo "$key => $value", PHP_EOL;
}
This would create the following output:
0 => 1
1 => 2
…
9 => 10
You can also control the $key in the foreach by using
yield $someKey => $someValue;
In the generator function, $someKey is whatever you want appear for $key and $someValue b...
What does the @ symbol represent in objective-c?
...cision of whether to generate GC write barriers.
Other exceptions are in, out, inout, oneway, byref, and bycopy; these are used as storage class annotations on method parameter and return types to make Distributed Objects more efficient. (They become part of the method signature available from the...
Proper MIME type for OTF fonts
...ourcing this update in their latest versions will start issuing warnings about the server MIME types with the old x-font-woff declaration. Since the warnings are only annoying I would recommend switching to the approved MIME type right away. In an ideal world, the warnings will resolve themselves in...
Python class inherits object
... # ... because int inherits from object
(<type 'object'>,)
Without a doubt, when writing a class you'll always want to go for new-style classes. The perks of doing so are numerous, to list some of them:
Support for descriptors. Specifically, the following constructs are made possible w...
When can I use a forward declaration?
... type, all the compiler knows is that this type exists; it knows nothing about its size, members, or methods. This is why it's called an incomplete type. Therefore, you cannot use the type to declare a member, or a base class, since the compiler would need to know the layout of the type.
Assuming t...
How do I get logs/details of ansible-playbook module executions?
...ass 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
...
Change working directory in my current shell context when running Node script
...and easily change the current shell location to that. Now that I think about it, I am going to look into how z (github.com/rupa/z) does this. Although that is done in bash. I could perhaps do this in applescript?
– Jonovono
Nov 6 '13 at 4:05
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Bash: infinite sleep (infinite blocking)
...
sleep infinity does exactly what it suggests and works without cat abuse.
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How to do SELECT COUNT(*) GROUP BY and ORDER BY in Django?
...otal=Count('actor')).order_by()
However one more thing must be pointed out:
If the model has a default ordering defined in class Meta, the .order_by() clause is obligatory for proper results. You just cannot skip it even when no ordering is intended.
Further, for a high quality code it is advi...
Which method performs better: .Any() vs .Count() > 0?
... on SQL Server (EntityFramework 4).
Here is query with Any that thew timeout exception (on ~200.000 records):
con = db.Contacts.
Where(a => a.CompanyId == companyId && a.ContactStatusId <= (int) Const.ContactStatusEnum.Reactivated
&& !a.NewsletterLogs.Any(b =>...