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Find lines from a file which are not present in another file [duplicate]
...le1) <(sort -u file2)
Solution 2: (the first "working" answer I found) from unix.stackexchange:
fgrep -v -f file1 file2
Note that if file2 contains duplicate lines that don't exist at all in file1, fgrep will output each of the duplicate lines. Also note that my totally non-scientific tests on...
Converting stream of int's to char's in java
...se InputStreamReader with the appropriate Charset instead.
Simply casting from int to char only works if you want ISO-8859-1, if you're reading bytes from a stream directly.
EDIT: If you are already using a Reader, then casting the return value of read() to char is the right way to go (after check...
The shortest possible output from git log containing author and date
...uthor name
%ad = author date (format respects --date= option)
%s = subject
From kernel.org/pub/software/scm/git/docs/git-log.html (PRETTY FORMATS section) by comment of Vivek.
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Zero-based month numbering [closed]
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The use of zero to start counting is actually an optimization trick from Assembly programmers. Instead of assigning 1 to the count register, they XOR'ed the register with itself, which was slightly faster in CPU cycles. This meant that counting would start with 0 and would always be up to the...
Why do we use volatile keyword? [duplicate]
...f some_int, so it may be tempted to optimize the while loop by changing it from while(some_int == 100) to something which is equivalent to while(true) so that the execution could be fast (since the condition in while loop appears to be true always). (if the compiler doesn't optimize it, then it has ...
How to migrate back from initial migration in Django 1.7?
...also:
python manage.py migrate <app> zero
This clears <app> from migration history and drops all tables of <app>
See django docs for more info.
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How to get the last N records in mongodb?
...een documented this. By default, the find() operation will get the records from beginning. How can I get the last N records in mongodb?
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connecting to MySQL from the command line
How can you connect to MySQL from the command line in a Mac? (i.e. show me the code)
6 Answers
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Format numbers in django templates
...a dollar sign. This goes somewhere like my_app/templatetags/my_filters.py
from django import template
from django.contrib.humanize.templatetags.humanize import intcomma
register = template.Library()
def currency(dollars):
dollars = round(float(dollars), 2)
return "$%s%s" % (intcomma(int(d...
Stop all active ajax requests in jQuery
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The variable has to be declared global to access it from another function when an ajax call is in progress. example: a multi-file upload process.
– Clain Dsilva
Oct 3 '18 at 14:57
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