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Jinja2 template variable if None Object set a default value
How to make a variable in jijna2 default to "" if object is None instead of doing something like this?
9 Answers
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Delete directory with files in it?
...check for dots (. and ..) and it deletes the resolved path, not the actual one.
– Alix Axel
Jun 1 '11 at 7:53
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How to convert an entire MySQL database characterset and collation to UTF-8?
...rent data is actually in the current char set. If your columns are set to one char set but your data is really stored in another then you will need to check the MySQL manual on how to handle this.
ALTER TABLE tbl_name CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;
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How to delete and replace last line in the terminal using bash?
...arriage return with \r
seq 1 1000000 | while read i; do echo -en "\r$i"; done
from man echo:
-n do not output the trailing newline
-e enable interpretation of backslash escapes
\r carriage return
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Finding duplicates in O(n) time and O(1) space
...oop permutes the array so that if element x is present at least once, then one of those entries will be at position A[x].
Note that it may not look O(n) at first blush, but it is - although it has a nested loop, it still runs in O(N) time. A swap only occurs if there is an i such that A[i] != i, a...
How to make good reproducible pandas examples
...bits the issue you are facing.
* Every rule has an exception, the obvious one is for performance issues (in which case definitely use %timeit and possibly %prun), where you should generate (consider using np.random.seed so we have the exact same frame): df = pd.DataFrame(np.random.randn(100000000,...
Portable way to get file size (in bytes) in shell?
...disk. It was slow enough that I could re-write the script before the first one finished, came here to remember how I did it lol.
– Camilo Martin
Jul 27 '12 at 13:43
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What is the difference between . (dot) and $ (dollar sign)?
...==>
f . g . h $ x
In other words in a chain of $s, all but the final one can be replaced by .
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Mimicking sets in JavaScript?
...S6 compatibility table to see the current status for browser availability.
One advantage of the built-in Set object is that it doesn't coerce all keys to a string like the Object does so you can have both 5 and "5" as separate keys. And, you can even use Objects directly in the set without a string...
How can I measure the similarity between two images? [closed]
I would like to compare a screenshot of one application (could be a Web page) with a previously taken screenshot to determine whether the application is displaying itself correctly. I don't want an exact match comparison, because the aspect could be slightly different (in the case of a Web app, depe...