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Determine the number of lines within a text file
...much memory as the size of the file. The second merely loops one line at a time so it never has to allocate more than one line's worth of memory at a time. This isn't that important for small files, but for larger files it could be an issue (if you try and find the number of lines in a 4GB file on a...
Argparse: Way to include default values in '--help'?
...d information about the default value to.
The exact output for your scan-time option then becomes:
--scan-time [SCAN_TIME]
Wait SCAN-TIME seconds between status checks.
(default: 5)
...
How to reload a clojure file in REPL
...ure.tools.namespace.repl. Subsequent calls to (refresh) will give you a RuntimeException, "Unable to resolve symbol: refresh in this context." Probably the best thing to do is to either (require 'your.namespace :reload-all), or, if you know you're going to want to refresh your REPL a lot for a given...
What is the optimal algorithm for the game 2048?
...ing watching.
To assess the score performance of the AI, I ran the AI 100 times (connected to the browser game via remote control). For each tile, here are the proportions of games in which that tile was achieved at least once:
2048: 100%
4096: 100%
8192: 100%
16384: 94%
32768: 36%
The minimum s...
Regex: match everything but specific pattern
...
That's true, but it only processes one character at a time. If you want to exclude a sequence of two or more characters, you have to use negative lookahead like the other responders said.
– Alan Moore
Jul 20 '13 at 10:42
...
MySQL SELECT WHERE datetime matches day (and not necessarily time)
I have a table which contains a datetime column. I wish to return all records of a given day regardless of the time. Or in other words, if my table only contained the following 4 records, then only the 2nd and 3rd would be returned if I limit to 2012-12-25.
...
jquery - fastest way to remove all rows from a very large table
...(child) syntax is faster than $(target > child). Why? Sizzle!
Elapsed Time to Empty 3,161 Table Rows
Using the Detach() method (as shown in my example above):
Firefox: 0.027s
Chrome: 0.027s
Edge: 1.73s
IE11: 4.02s
Using the empty() method:
Firefox: 0.055s
Chrome: 0.052s
Edge: 137.99s ...
Why is Thread.Sleep so harmful
...hread.Sleep(n) means block the current thread for at least the number
of timeslices (or thread quantums) that can occur within n
milliseconds.
The length of a timeslice is different on different versions/types of
Windows and different processors and generally ranges from 15 to 30
milliseco...
Convert SQLITE SQL dump file to POSTGRESQL
...T commands, so these need to be removed.
You'll also want to check for datetime columns in the SQLite schema and change them to timestamp for PostgreSQL. (Thanks to Clay for pointing this out.)
If you have booleans in your SQLite then you could convert 1 and 0 to 1::boolean and 0::boolean (respectiv...
What is a None value?
...ker has a unique name written on it, and it can only be on one object at a time, but you could put more than one sticker on the same object, if you wanted to. When you write
F = "fork"
you put the sticker "F" on a string object "fork". If you then write
F = None
you move the sticker to the N...