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How to find out the number of CPUs using python
...said of "Googling"--- I find from the use of /proc/cpuinfo that if for any one of the listings for each "processor" you multiply the "siblings" by the "cpu cores" you get your "Cpus_allowed" number. And I gather that the siblings refer to hyper-threading, hence your reference to "virtual". But the f...
Python assigning multiple variables to same value? list behavior
...assign them individually. You can either repeat the explicit list, or use one of the numerous ways to copy a list:
b = a[:] # this does a shallow copy, which is good enough for this case
import copy
c = copy.deepcopy(a) # this does a deep copy, which matters if the list contains mutable objects
As...
Any shortcut to initialize all array elements to zero?
...he language spec:
Each class variable, instance variable, or array component is initialized with a default value when it is created (§15.9, §15.10) [...] For type int, the default value is zero, that is, 0.
If you want to initialize an one-dimensional array to a different value, you can u...
How to set the font size in Emacs?
...u could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
'(default ((t (:stipple nil :background "white" :foreground "black" :inverse-video nil :box nil :strike-through nil :overline nil :underline nil :slan...
Why “no projects found to import”?
...reate project from existing source).
I think you probably want the second one, because Eclipse projects usually have separate source & build directories. If your sources and .class files are in the same directory, you probably didn't have a eclipse project.
...
Remove all special characters, punctuation and spaces from string
...
This can be done without regex:
>>> string = "Special $#! characters spaces 888323"
>>> ''.join(e for e in string if e.isalnum())
'Specialcharactersspaces888323'
You can use str.isalnum:
S.isalnum() -> bool
Re...
Threads vs Processes in Linux
...ds -- everything is simply a runnable task. *
On Linux, the system call clone clones a task, with a configurable level of sharing, among which are:
CLONE_FILES: share the same file descriptor table (instead of creating a copy)
CLONE_PARENT: don't set up a parent-child relationship between the new...
How does grep run so fast?
...lmost always faster when grepping for a longer pattern-string than a short one, because in a longer pattern, Boyer-Moore can skip forward in longer strides to achieve even better sublinear speeds:
Example:
# after running these twice to ensure apples-to-apples comparison
# (everything is in the bu...
Staging Deleted files
...-no-all option if you want to add modified or new files but ignore removed ones.
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Curl GET request with json parameter
...avior. You may be better off using the url query parameters like you say. One issue with using a body on a get request is that the browser can not replay the request by navigating with the browser history, though this is probably fine for XHR requests.
– Steven Soroka
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