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How many files can I put in a directory?
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I have had over 8 million files in a single ext3 directory. libc readdir() which is used by find, ls and most of the other methods discussed in this thread to list large directories.
The reason ls and find are slow in this case is that readdir() only reads 32K of directory entries at a t...
How to get an object's property's value by property name?
...your question and explain why he should try this and why it improves the already existing answers.
– T3 H40
Jan 15 '16 at 14:41
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List directory in Go
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You can try using the ReadDir function in the io/ioutil package. Per the docs:
ReadDir reads the directory named by dirname and returns a list of sorted directory entries.
The resulting slice contains os.FileInfo types, which provide the met...
Nested Git repositories?
...stead of having the context of a helper shell script; I found it easier to read.
– John K
May 16 '11 at 5:21
4
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Django REST Framework: adding additional field to ModelSerializer
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Note that SerializerMethodField is read-only, so this won't work for incoming POST/PUT/PATCH.
– Scott A
Aug 4 '15 at 19:12
25
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Multithreading: What is the point of more threads than cores?
...thought the point of a multi-core computer is that it could run multiple threads simultaneously. In that case, if you have a quad-core machine, what's the point of having more than 4 threads running at a time? Wouldn't they just be stealing time (CPU Resources) from each other?
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dd: How to calculate optimal blocksize? [closed]
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(Note: The unit of the transfer rates will vary by OS)
To test optimal read block size, you could use more or less the same process,
but instead of reading from /dev/zero and writing to the disk, you'd read from
the disk and write to /dev/null. A script to do this might look like so:
dd_ibs_tes...
Recursively counting files in a Linux directory
...hat's not going to help, unless some implementation of wc has an option to read a null terminated list. See my answer for an alternative.
– Reinstate Monica Please
Mar 16 '15 at 1:34
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What does the “yield” keyword do?
...you must understand iterables.
Iterables
When you create a list, you can read its items one by one. Reading its items one by one is called iteration:
>>> mylist = [1, 2, 3]
>>> for i in mylist:
... print(i)
1
2
3
mylist is an iterable. When you use a list comprehension, you...
JSON to pandas DataFrame
...th1+'&sensor=false')
response = urlopen(request)
elevations = response.read()
data = json.loads(elevations)
df = pd.json_normalize(data['results'])
This gives a nice flattened dataframe with the json data that I got from the Google Maps API.
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