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Common programming mistakes for Clojure developers to avoid [closed]
...r code. This also happens frequently when you're refactoring, moving a var from one namespace to another.
Treating the for list comprehension like an imperative for loop
Essentially you're creating a lazy list based on existing lists rather than simply performing a controlled loop. Clojure's dos...
Read only the first line of a file?
...d in the docs, unless it is the only line in the file, the string returned from f.readline() will contain a trailing newline. You may wish to use f.readline().strip() instead to remove the newline.
The with statement automatically closes the file again when the block ends.
The with statement only wo...
Can media queries resize based on a div element instead of the screen?
...some way I may be able to use functions with media queries to get the size from a containing element. Is there some way I can combine this with media queries to resize elements?
– appshare.co
Sep 7 '12 at 15:31
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Why does datetime.datetime.utcnow() not contain timezone information?
..., you could pass tzinfo to datetime.now() directly:
#!/usr/bin/env python
from datetime import datetime
import pytz # $ pip install pytz
print(datetime.now(pytz.timezone("America/New_York")))
It works for any timezone including those that observe daylight saving time (DST) i.e., it works for tim...
Gradle, Android and the ANDROID_HOME SDK location
...file and put it at the top level folder in your project, even you can copy from another project too.
Screenshot reference:
Hope this would save your time.
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How to get the seconds since epoch from the time + date output of gmtime()?
...datetime.datetime.utcnow()- ep).total_seconds()
This should be different from int(time.time()), but it is safe to use something like x % (60*60*24)
datetime — Basic date and time types:
Unlike the time module, the datetime module does not support leap seconds.
...
EC2 Can't resize volume after increasing size
...re increasing EBSs into larger sizes
Stop the instance
Create a snapshot from the volume
Create a new volume based on the snapshot increasing the size
Check and remember the current's volume mount point (i.e. /dev/sda1)
Detach current volume
Attach the recently created volume to the instance, sett...
How to extract the first two characters of a string in shell scripting?
...s creation overhead. All solutions which use external programs will suffer from that overhead.
If you also wanted to ensure a minimum length, you could pad it out before hand with something like:
pax> long="A"
pax> tmpstr="${long}.."
pax> short="${tmpstr:0:2}" ; echo "${short}"
A.
This ...
When should I use “this” in a class?
...od of another object. The third is as a way to call alternate constructors from within a constructor.
Case 1: Using this to disambiguate variable references. In Java setter methods, we commonly pass in an argument with the same name as the private member variable we are attempting to set. We then a...
Function to return only alpha-numeric characters from string?
...m%2fquestions%2f5199133%2ffunction-to-return-only-alpha-numeric-characters-from-string%23new-answer', 'question_page');
}
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