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How to create the most compact mapping n → isprime(n) up to a limit N?
...eally want speed and the range is limited, I implement a pseudo-prime test based on Fermat's little theorem. If I really want more speed (i.e. avoid O(sqrt(N)) algorithm altogether), I precompute the false positives (see Carmichael numbers) and do a binary search. This is by far the fastest test I'v...
Django Admin - Disable the 'Add' action for a specific model
...rgs):
form = super().get_form(request, obj, **kwargs)
form.base_fields['service'].widget.can_add_related = False
return form
In my case I use inline
# In inline formset e.g. admin.TabularInline
# disable all
def get_formset(self, request, obj=None, **kwargs):
f...
Get PHP class property by string
How do I get a property in a PHP based on a string? I'll call it magic . So what is magic ?
12 Answers
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How to change fontFamily of TextView in Android
...═══════════════╝
Here is the parser (based off FontListParser):
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
imp...
Difference between a Factory, Provider and a Service?
...es classes, either by composing a bunch of bits together, or choosing type based on some kind of context
Provider: Provider is something microsoft "invented" (basically an abstract factory pattern) that is a way of doing a factory of factories, or having a common factory interface which allows fact...
The transaction manager has disabled its support for remote/network transactions
...t the "Distributed Transaction Coordinator" Service is
running on both database and client.
Also make sure you check "Network DTC Access", "Allow Remote Client",
"Allow Inbound/Outbound" and "Enable TIP".
To enable Network DTC Access for MS DTC transactions
Open the Component Services snap-in.
T...
PHP CURL DELETE request
... $nonce = uniqid();
$created = date('c');
$digest = base64_encode(sha1(base64_decode($nonce) . $created . $this->_apiKey, true));
$wsseHeader = "Authorization: WSSE profile=\"UsernameToken\"\n";
$wsseHeader .= sprintf(
'X-WSSE: UsernameToken Use...
Drawing a dot on HTML5 canvas [duplicate]
...entation in my example is actually at least twice as fast as the ImageData based double buffering approach.
At least for my scenario it seems that the built-in ctx.getImageData/ctx.putImageData is in fact unbelievably SLOW. (It would be interesting to know the percentage of pixels that need to be ...
Open Source Java Profilers [closed]
... Application Profiling using TPTP and here's a tutorial Profiling J2SE 5.0 based applications using Eclipse TPTP.
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Some questions about Automatic Reference Counting in iOS5 SDK
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@Brad The install base for iOS4 is already more than 95%. I think it's save to drop iOS3 support anyway.
– Henrik P. Hessel
Jun 20 '11 at 22:01
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