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Makefile经典教程（入门必备） - C/C++ - 清泛网移动版 - 专注C/C++及内核技术
Makefile经典教程（入门必备）Linux_Shell_Classic_tutorialmakefile很重要 什么是makefile？或许很多Winodws的程序员都不知道这个东西，因为那些Windows的IDE都为你做了这个工作，但我觉得要作
makefile。makefile带来的好处就是——“自动化...
How do I do an OR filter in a Django query?
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There is Q objects that allow to complex lookups. Example:
from django.db.models import Q
Item.objects.filter(Q(creator=owner) | Q(moderated=False))
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im...
How to generate a random integer number from within a range
...he only correct way of changing the range of rand() is to divide it into boxes; for example, if RAND_MAX == 11 and you want a range of 1..6, you should assign {0,1} to 1, {2,3} to 2, and so on. These are disjoint, equally-sized intervals and thus are uniformly and independently distributed.
The su...
Change values while iterating
... slice you're iterating over.
The specification about range says:
Range expression 1st value 2nd value (if 2nd variable is present)
array or slice a [n]E, *[n]E, or []E index i int a[i] E
So, range uses a[i] as its second value for array...
Limiting floats to two decimal points
...oblem with floating point numbers that not all numbers can be represented exactly. The command line is just showing you the full floating point form from memory.
With floating point representation, your rounded version is the same number. Since computers are binary, they store floating point number...
When should I use genetic algorithms as opposed to neural networks? [closed]
Is there a rule of thumb (or set of examples) to determine when to use genetic algorithms as opposed to neural networks (and vice-versa) to solve a problem?
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textarea - disable resize on x or y?
I know it's possible to disable the resize of a textarea by using:
2 Answers
2
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Position a CSS background image x pixels from the right?
...is no, but can you position a background image with CSS, so that it is a fixed amount of pixels away from the right?
21 Ans...
What is this weird colon-member (“ : ”) syntax in the constructor?
Recently I've seen an example like the following:
12 Answers
12
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Multiple simultaneous downloads using Wget?
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use the aria2 :
aria2c -x 16 [url]
# |
# |
# |
# ----> the number of connections
http://aria2.sourceforge.net
I love it !!
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