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How to explain dependency injection to a 5-year-old? [closed]
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I give you dependency injection for five-year-olds.
When you go and get things out of the refrigerator for yourself, you can cause problems. You might leave the door open, you might get something Mommy or Daddy doesn't want you to have. You might even be looking for something we don't eve...
Detect if a NumPy array contains at least one non-numeric value?
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This should be faster than iterating and will work regardless of shape.
numpy.isnan(myarray).any()
Edit: 30x faster:
import timeit
s = 'import numpy;a = numpy.arange(10000.).reshape((100,100));a[10,10]=numpy.nan'
ms = [
'numpy.isnan(a).any()',
'any(n...
Set Django IntegerField by choices=… name
...bject. Hard to find with Google too so thanks.
– Alexander Ljungberg
Jul 13 '09 at 13:54
1
FWIW, ...
The EXECUTE permission was denied on the object 'xxxxxxx', database 'zzzzzzz', schema 'dbo'
...nswered Sep 14 '10 at 11:23
Rowland ShawRowland Shaw
35.8k1212 gold badges8888 silver badges158158 bronze badges
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Learning WebGL and three.js [closed]
I'm new and starting to learn about 3D computer graphics in web browsers. I'm interested in making 3D games in a browser. For anyone who has learned both WebGL and three.js...
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Is an array name a pointer?
...ame a pointer in C?
If not, what is the difference between an array's name and a pointer variable?
10 Answers
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What does = +_ mean in JavaScript
...page on Arithmetic Operators:
The unary plus operator precedes its operand and evaluates to its
operand but attempts to converts it into a number, if it isn't
already. [...] It can convert string representations of integers and
floats, as well as the non-string values true, false, and null...
CSS Classes & SubClasses
...means:
Apply this style to any element that has both the class "area1" and "item".
Such as:
<div class="area1 item">
Sadly it doesn't work in IE6, but that's what it means.
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im...
What is the overhead of creating a new HttpClient per call in a WebAPI client?
... re-used for multiple calls. Even across multiple threads.
The HttpClientHandler has Credentials and Cookies that are intended to be re-used across calls. Having a new HttpClient instance requires re-setting up all of that stuff.
Also, the DefaultRequestHeaders property contains properties that ar...
sql primary key and index
...x does no good, but the only harm (very small) is the additional file size and row-creation overhead.
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