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Property getters and setters
... Int {
set { _x = 2 * newValue }
get { return _x / 2 }
}
}
Specifically, in the Swift REPL:
15> var pt = Point()
pt: Point = {
_x = 0
}
16> pt.x = 10
17> pt
$R3: Point = {
_x = 20
}
18> pt.x
$R4: Int = 10
...
Redis: Show database size/size for keys
...acticable for debugging to me, not too mention that the dump is a few gigs now!
– Bernhard Vallant
Oct 3 '11 at 23:47
...
How do I check if an element is really visible with JavaScript? [duplicate]
...
I don't know how much of this is supported in older or not-so-modern browsers, but I'm using something like this (without the neeed for any libraries):
function visible(element) {
if (element.offsetWidth === 0 || element.offsetHeig...
Creating a JSON response using Django and Python
...JSON content.
import json
from django.http import HttpResponse
response_data = {}
response_data['result'] = 'error'
response_data['message'] = 'Some error message'
Pre-Django 1.7 you'd return it like this:
return HttpResponse(json.dumps(response_data), content_type="application/json")
For D...
Gradle, “sourceCompatibility” vs “targetCompatibility”?
...
Since Java 9 there is now a new javac option --release intended to address this problem, by only allowing use of API available in the specified Java version. For more on this see stackoverflow.com/a/43103038/4653517
– James M...
invalid target release: 1.7
...red Nov 26 '13 at 13:18
Michał NowakMichał Nowak
1,68711 gold badge1212 silver badges1616 bronze badges
...
C# Float expression: strange behavior when casting the result float to int
...igher precision than the formal type (section 11.2.2). That's why you see different behavior on different systems: In the expression (int)(6.2f * 10), the compiler has the option of keeping the value 6.2f * 10 in a high precision intermediate form before converting to int. If it does, then the resul...
Counting the Number of keywords in a dictionary in python
...
len(yourdict.keys())
or just
len(yourdict)
If you like to count unique words in the file, you could just use set and do like
len(set(open(yourdictfile).read().split()))
share
|
...
Can I implement an autonomous `self` member type in C++?
...
class WITH_SELF(Foo)
{
void test()
{
self foo;
}
};
If you want to derive from Foo then you should use the macro WITH_SELF_DERIVED in the following way:
class WITH_SELF_DERIVED(Bar,Foo)
{
/* ... */
};
You can even do multiple inheritance with as many base classes as you...
Android: Getting a file URI from a content URI?
... Check the scheme of the URI returned to you from the chooser activity. If if uri.getScheme.equals("content"), open it with a content resolver. If the uri.Scheme.equals("file"), open it using normal file methods. Either way, you'll end up with an InputStream that you can process using common code...