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How to use mod operator in bash?
...le mathematically -12 mod 10 is 8, bash will calculate it as -2. You can test it with simple echo $((-12 % 10)) (-2) and compare it with python3 python3 -c "print(-12 % 10)" (8).
– Lirt
Jan 28 '19 at 22:39
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Why is iterating through a large Django QuerySet consuming massive amounts of memory?
...pproach suggested by mpaf uses much less memory, but is 2-3x slower for my test case.
from django.core.paginator import Paginator
def chunked_iterator(queryset, chunk_size=10000):
paginator = Paginator(queryset, chunk_size)
for page in range(1, paginator.num_pages + 1):
for obj in ...
Django REST framework: non-model serializer
...r.
Here are a few snippets may help you out:
Please note that I have not tested this. It's only meant as an example, but it should work :)
The CalcClass:
class CalcClass(object):
def __init__(self, *args, **kw):
# Initialize any variables you need from the input you get
pas...
How to get key names from JSON using jq
curl http://testhost.test.com:8080/application/app/version | jq '.version' | jq '.[]'
7 Answers
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How do I get current date/time on the Windows command line in a suitable format for usage in a file/
...% %ldt:~8,2%:%ldt:~10,2%:%ldt:~12,6%
echo Local date is [%ldt%]
C:>test.cmd
Local date is [2012-06-19 10:23:47.048]
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Send inline image in email
...sendHtmlEmail("from@gmail.com", "tomailaccount", Themessage, "Scoutfoto", "Test HTML Email", "smtp.gmail.com", 25);
}
protected void sendHtmlEmail(string from_Email, string to_Email, string body, string from_Name, string Subject, string SMTP_IP, Int32 SMTP_Server_Port)
{
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What actually causes a Stack Overflow error? [duplicate]
...ns a smaller depth before the memory allocated for the stack is exhausted. Test it with a method calling itself with 1 argument, then with 5 for example.
– JB Nizet
Mar 4 '14 at 22:07
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Python 3 turn range to a list
... in almost every way, sometimes more efficiently to boot (e.g. containment tests for ints are O(1), vs. O(n) for lists). In Python 2, people tended to use range by default, even though xrange was almost always the better option; in Python 3, you can to explicitly opt in to the list, not get it by ac...
Custom thread pool in Java 8 parallel stream
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Thanks. I did some testing/research and updated the answer. Looks like an update changed it, as it works in older versions.
– Tod Casasent
Jun 13 '19 at 14:09
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typeof !== “undefined” vs. != null
...o distinguish between the two. In many cases, == can be better, because it tests for both null and undefined.
– seanmonstar
Jun 19 '12 at 16:58
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