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Assigning a variable NaN in python without numpy
...answer downvoted unreasonably. I'm writing lots of small parsing tests in .txt files and using ast.literal_eval to get expected output part. It's impossible to call float('nan') there, and this answer was helpful for me.
– Vitalik Verhovodov
Mar 26 '18 at 15:59...
How do I use a custom deleter with a std::unique_ptr member?
...ample, with a FILE*:
deleted_unique_ptr<FILE> file(
fopen("file.txt", "r"),
[](FILE* f) { fclose(f); });
With this you get the benefits of exception-safe cleanup using RAII, without needing try/catch noise.
...
What does yield mean in PHP?
...bers. Here is an example using an array generated by explode() on a large .txt file (262MB in my use case):
<?php
ini_set('memory_limit','1000M');
echo "Starting memory usage: " . memory_get_usage()
How do I create a namespace package in Python?
...ith namespace_packages=['package'], setup.py will add a namespace_packages.txt in the EGG-INFO. Still don't know the impacts…
– Laurent LAPORTE
Dec 9 '16 at 11:55
1
...
What are commit-ish and tree-ish in Git?
...--------------------
| 15. <rev>:<path> | HEAD:README.txt, master:sub-directory/
----------------------------------------------------------------------
| Tree-ish? | Examples
----------------------------------------------------------------------
| ...
Regular expression to match DNS hostname or IP Address?
...domain names:
tld=$(curl -s http://data.iana.org/TLD/tlds-alpha-by-domain.txt | sed 1d | cut -f1 -d'-' | tr '\n' '|' | sed 's/\(.*\)./\1/')
echo "($tld)"
That should give you a nice piece of re code that checks for legality of top domain name, like .com .org or .ca
Then add first part of the e...
How do I check for a network connection?
...DNS lookup on www.msftncsi.com, then requests http://www.msftncsi.com/ncsi.txt. This file is a plain-text file and contains only the text 'Microsoft NCSI'.
NCSI sends a DNS lookup request for dns.msftncsi.com. This DNS address should resolve to 131.107.255.255. If the address does not match, then it...
Adjust width of input field to its input
...s to run on textbox contents changing, something like this:
<input id="txt" type="text" onkeypress="this.style.width = ((this.value.length + 1) * 8) + 'px';">
Note: this solution only works when every character is exactly 8px wide.
...
What is the difference between `git merge` and `git merge --no-ff`?
....php
# deleted: ecc/ecc-config.php
# modified: ecc/readme.txt
# modified: ecc/test.php
# deleted: passthru-adapter.igs
# deleted: shop/mickey/index.php
#
# Untracked files:
# (use "git add <file>..." to include in what will be committed)
#
# e...
What is the EAFP principle in Python?
...ght that we could access the file.
import os
my_file = "/path/to/my/file.txt"
# Race condition
if os.access(my_file, os.R_OK):
with open(my_file) as f:
print(f.read())
else:
print("File can't be accessed")
EAFP - Easier to Ask for Forgiveness than Permission :
In this example, ...