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Get last n lines of a file, similar to tail
...] # blocks of size BLOCK_SIZE, in reverse order starting
# from the end of the file
while lines_to_go > 0 and block_end_byte > 0:
if (block_end_byte - BLOCK_SIZE > 0):
# read the last block we haven't yet read
f.seek(block_number*BLOCK_SIZ...
Checking from shell script if a directory contains files
From a shell script, how do I check if a directory contains files?
26 Answers
26
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namedtuple and default values for optional keyword arguments
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Python 3.7
Use the defaults parameter.
>>> from collections import namedtuple
>>> fields = ('val', 'left', 'right')
>>> Node = namedtuple('Node', fields, defaults=(None,) * len(fields))
>>> Node()
Node(val=None, left=None, right=None)
Or b...
ASP.Net MVC: How to display a byte array image from model
... this one worked for me too , kindly say How to display a byte array image from model when its null ?
– Chathz
Feb 19 '16 at 10:15
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How do I decode HTML entities in Swift?
I am pulling a JSON file from a site and one of the strings received is:
23 Answers
23...
How to remove the lines which appear on file B from another file A?
...s that match the entire line
-v: print non-matching
-f file: take patterns from the given file
This method is slower on pre-sorted files than other methods, since it is more general. If speed matters as well, see: Fast way of finding lines in one file that are not in another?
Here's a quick bash ...
Recommended way to get hostname in Java
...is possible for many reasons. Generally, software should get the hostname from the user in a config file, that way, it is always the correct hostname. You could use InetAddress.getLocalhost().getHostName() as a default if the user does not provide a value.
– Greg
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Why call git branch --unset-upstream to fixup?
...s case. Their purpose is to record things like the full URL of the places from which you git fetch or git pull updates. When you use git fetch remote,1 Git goes to that remote (using the saved URL) and brings over the appropriate set of updates. It also records the updates, using "remote-tracking...
Using R to download zipped data file, extract, and import data
...to fetch the file into the temp. file
Use unz() to extract the target file from temp. file
Remove the temp file via unlink()
which in code (thanks for basic example, but this is simpler) looks like
temp <- tempfile()
download.file("http://www.newcl.org/data/zipfiles/a1.zip",temp)
data <- re...
Prevent errors from breaking / crashing gulp watch
I'm running gulp 3.6.2 and have the following task that was set up from a sample online
8 Answers
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