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Split a String into an array in Swift?
...meArr[1] : nil
with Swift 2
In Swift 2 the use of split becomes a bit more complicated due to the introduction of the internal CharacterView type. This means that String no longer adopts the SequenceType or CollectionType protocols and you must instead use the .characters property to access a Ch...
Cannot pass null argument when using type hinting
...
PHP 7.1 or newer (released 2nd December 2016)
You can explicitly declare a variable to be null with this syntax
function foo(?Type $t) {
}
this will result in
$this->foo(new Type()); // ok
$this->foo(null); // ok
$this->...
How to expire session due to inactivity in Django?
.... something like this should handle the whole process...
from datetime import datetime
from django.http import HttpResponseRedirect
class SessionExpiredMiddleware:
def process_request(request):
last_activity = request.session['last_activity']
now = datetime.now()
if (n...
What is an API key? [closed]
I see this word in almost every cross service application these days.
6 Answers
6
...
Singleton by Jon Skeet clarification
...ccess to its outer class's private members, including the private constructor here.
Read my article on beforefieldinit. You may or may not want the no-op static constructor - it depends on what laziness guarantees you need. You should be aware that .NET 4 changes the actual type initialization seman...
Ignore Xcode warnings when using Cocoapods
...ibraries which have many warnings in it, after the latest Xcode updates. (for example the Facebook SDK pod)
Now all these warnings are shown in my Xcode on the place I want to see my own warnings or errors.
...
Download File Using Javascript/jQuery
... document.getElementById('my_iframe').src = url;
};
</script>
To force the browser to download a file it would otherwise be capable of rendering (such as HTML or text files), you need the server to set the file's MIME Type to a nonsensical value, such as application/x-please-download-me or ...
IDEA: javac: source release 1.7 requires target release 1.7
...
Most likely you have incorrect compiler options imported from Maven here:
Also check project and module bytecode (target) version settings outlined on the screenshot.
Other places where the source language level is configured:
Project Structur...
Is there a numpy builtin to reject outliers from a list
...
This method is almost identical to yours, just more numpyst (also working on numpy arrays only):
def reject_outliers(data, m=2):
return data[abs(data - np.mean(data)) < m * np.std(data)]
s...
A migration to add unique constraint to a combination of columns
... a migration to apply unique constraint to a combination of columns. i.e. for a people table, a combination of first_name , last_Name and Dob should be unique.
...