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HTML 5 tag vs Flash video. What are the pros and cons?
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Converting numpy dtypes to native python types
..., how do I automatically convert it to its closest python data type? For example,
12 Answers
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Add a prefix string to beginning of each line
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# If you want to edit the file in-place
sed -i -e 's/^/prefix/' file
# If you want to create a new file
sed -e 's/^/prefix/' file > file.new
If prefix contains /, you can use any other character not in prefix, or
escape the /, so the sed command becomes
's#^#/opt/workdir#'
# or...
用Javascript获取页面元素的位置（全） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...mpat"){
return {
width: Math.max(document.body.scrollWidth,
document.body.clientWidth),
height: Math.max(document.body.scrollHeight,
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Approximate cost to access various caches and main memory?
Can anyone give me the approximate time (in nanoseconds) to access L1, L2 and L3 caches, as well as main memory on Intel i7 processors?
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Total memory used by Python process?
... a useful solution that works for various operating systems, including Linux, Windows 7, etc.:
import os
import psutil
process = psutil.Process(os.getpid())
print(process.memory_info().rss) # in bytes
On my current Python 2.7 install with psutil 5.6.3, the last line should be
print(process.m...
In Django - Model Inheritance - Does it allow you to override a parent model's attribute?
...from it:
class AbstractPlace(models.Model):
name = models.CharField(max_length=20)
rating = models.DecimalField()
class Meta:
abstract = True
class Place(AbstractPlace):
pass
class LongNamedRestaurant(AbstractPlace):
name = models.CharField(max_length=255)
food_ty...
git merge: apply changes to code that moved to a different file
...ork to match the target file organization.
Say that you modified original.txt on your branch (the local branch), but on the master branch, original.txt has been copied to another one, say copy.txt.
This copy has been done in a commit that we name commit CP.
You want to apply all your local changes, ...
What's the difference between “mod” and “remainder”?
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There is a difference between modulus and remainder. For example:
-21 mod 4 is 3 because -21 + 4 x 6 is 3.
But -21 divided by 4 gives -5 with a remainder of -1.
For positive values, there is no difference.
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What regular expression will match valid international phone numbers?
...1234 (UK) is also perfectly valid if written 0044 8984 1234 which this regexp (and on other answers as well) does not support.
– Xeroxoid
Aug 11 '15 at 15:29
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