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What is the difference between user and kernel modes in operating systems?
...t
of the code running on your computer
will execute in user mode.
Read more
Understanding User and Kernel Mode
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How to replace NaN values by Zeroes in a column of a Pandas Dataframe?
...te(df.loc[idx[:,mask_1],idx[[mask_2],:]].fillna(value=0))
It's one line, reads reasonably well (sort of) and eliminates any unnecessary messing with intermediate variables or loops while allowing you to apply fillna to any multi-level slice you like!
If anybody can find places this doesn't work p...
What is the meaning of “non temporal” memory accesses in x86
...nd not (immediately) consumed again, the fact that memory store operations read a full cache line first and then modify the cached data is detrimental to performance. This operation pushes data out of the caches which might be needed again in favor of data which will not be used soon. This is especi...
What does Redis do when it runs out of memory?
...e more memory, like SET, LPUSH, and so on, and will continue
# to reply to read-only commands like GET.
#
# This option is usually useful when using Redis as an LRU cache, or to set
# a hard memory limit for an instance (using the 'noeviction' policy).
#
# WARNING: If you have slaves attached to an ...
How can I remove an element from a list?
...he back of the list to the front.
A response to that post later in the thread states:
For deleting an element of a list, see R FAQ 7.1
And the relevant section of the R FAQ says:
... Do not set x[i] or x[[i]] to NULL, because this will remove the corresponding component from the list.
...
Convert list of dictionaries to a pandas DataFrame
... NaN NaN
1 7.0 9.0 NaN NaN NaN 5.0
2 NaN 4.0 7.0 NaN 6.0 NaN
Reading Subset of Columns
"What if I don't want to read in every single column"? You can easily specify this using the columns=... parameter.
For example, from the example dictionary of data2 above, if you wanted to read only...
Get data from file input in JQuery
...
You can try the FileReader API. Do something like this:
<!DOCTYPE html>
<html>
<head>
<script>
function handleFileSelect()
{
if (!window.File || !window.FileReader || !...
Standard way to embed version into python package?
...
VERSIONFILE="myniftyapp/_version.py"
verstrline = open(VERSIONFILE, "rt").read()
VSRE = r"^__version__ = ['\"]([^'\"]*)['\"]"
mo = re.search(VSRE, verstrline, re.M)
if mo:
verstr = mo.group(1)
else:
raise RuntimeError("Unable to find version string in %s." % (VERSIONFILE,))
Then your setu...
C# elegant way to check if a property's property is null
...graph only three levels deep to be in need of refactoring when you're only reading properties. I'd agree if the OP wanted to call a method on an object referenced through PropertyC but not when it's a property that only needs checking for null before reading. In this example it could be as simpl...
Why do I need an IoC container as opposed to straightforward DI code? [closed]
...eed to use an Inversion of Control (IoC) container. However, the more I read, the more pressure I feel from the community to use an IoC container.
...