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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...
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...
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...
What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
...oo(1,2,3)
# 1
# 2
# 3
The **kwargs will give you all
keyword arguments except for those corresponding to a formal parameter as a dictionary.
def bar(**kwargs):
for a in kwargs:
print(a, kwargs[a])
bar(name='one', age=27)
# age 27
# name one
Both idioms can be mixed with normal a...
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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How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
I've been digging through some parts of the Linux kernel, and found calls like this:
10 Answers
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What is this weird colon-member (“ : ”) syntax in the constructor?
Recently I've seen an example like the following:
12 Answers
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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...
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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