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Determining Whether a Directory is Writeable
...ier to ask for forgiveness" is not the best way, even in Python. It is sometimes advisable to "ask permission" as with the os.access() method mentioned, for example when the probability of having to catch an error is high.
– mjv
Feb 6 '10 at 19:32
...
How can I randomize the lines in a file using standard tools on Red Hat Linux?
...k, but it doesn't. It still displays the shuffled file to stdout, but this time it deletes the original. I suggest you don't use it.
Consider a shell script:
#!/bin/sh
if [[ $# -eq 0 ]]
then
echo "Usage: $0 [file ...]"
exit 1
fi
for i in "$@"
do
perl -MList::Util -e 'print List::Util::shuf...
Is there a link to GitHub for downloading a file in the latest release of a repository?
...k to download a specific version of the published software. However, every time a release is made, the gh-page also needs to be updated.
...
Serializing class instance to JSON
... serial = obj.isoformat()
return serial
if isinstance(obj, time):
serial = obj.isoformat()
return serial
return obj.__dict__
First two ifs are for date and time serialization
and then there is a obj.__dict__ returned for any other object.
the final call looks ...
Generate random numbers with a given (numerical) distribution
...
On my machine numpy.random.choice() is almost 20 times faster.
– Eugene Pakhomov
Jun 18 '16 at 6:26
9
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Better techniques for trimming leading zeros in SQL Server?
I've been using this for some time:
15 Answers
15
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Do browsers parse javascript on every page load?
Do browsers (IE and Firefox) parse linked javascript files every time the page refreshes?
6 Answers
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How to send email to multiple recipients using python smtplib?
...se smtplib.sendmail to send to multiple recipients. The problem was every time the mail would be sent the mail headers would appear to contain multiple addresses, but in fact only the first recipient would receive the email.
...
Find string between two substrings [duplicate]
...ing size. Some of the other methods assumed you'd know the length ahead of time.
– Kenny Powers
Jan 11 '17 at 3:16
add a comment
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What is “export default” in javascript?
... function hello2() {
console.log("Module2: Saying hello for the second time!");
}
export let variable2 = 456;
modul3.js
export default function hello3() {
console.log("Module3: Saying hello for the third time!");
}
index.html
<script type="module">
import * as mod from './modul....