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Why dict.get(key) instead of dict[key]?
...r i in range(100):
s = d[i]
Now timing these two functions using timeit
>>> import timeit
>>> print(timeit.timeit("getway({i:i for i in range(100)})","from __main__ import getway"))
20.2124660015
>>> print(timeit.timeit("lookup({i:i for i in range(100)})","from ...
JPA - Returning an auto generated id after persist()
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The ID is only guaranteed to be generated at flush time. Persisting an entity only makes it "attached" to the persistence context. So, either flush the entity manager explicitely:
em.persist(abc);
em.flush();
return abc.getId();
or return the entity itself rather than its ...
Java int to String - Integer.toString(i) vs new Integer(i).toString()
Sometimes java puzzles me.
I have a huge amount of int initializations to make.
11 Answers
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What are all possible pos tags of NLTK?
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To save some folks some time, here is a list I extracted from a small corpus. I do not know if it is complete, but it should have most (if not all) of the help definitions from upenn_tagset...
CC: conjunction, coordinating
& 'n and both but e...
Setup RSpec to test a gem (not Rails)
...u'd have to do to make sure you're using the same version of rspec all the time. That 0.56 seconds it took to run two tests was 99% taken up by the time it took my computer to load up rspec. Running hundreds of specs should be extremely fast. The only issue you could run into that I'm aware of is...
Random number generation in C++11: how to generate, how does it work? [closed]
...om" numbers, so a) use a different one (e.g. taken from /dev/urandom) each time, and b) store the seed if you wish to recreate a sequence of random choices.
#include <random>
typedef std::mt19937 MyRNG; // the Mersenne Twister with a popular choice of parameters
uint32_t seed_val; ...
HTTP GET Request in Node.js Express
...If you're looking for async/await (linear, no callback), promises, compile time support and intellisense, we created a lightweight HTTP and REST client that fits that bill:
Microsoft typed-rest-client
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PHP & mySQL: Year 2038 Bug: What is it? How to solve it?
I was thinking of using TIMESTAMP to store the date+time, but I read that there is a limitation of year 2038 on it. Instead of asking my question in bulk, I preferred to break it up into small parts so that it is easy for novice users to understand as well. So my question(s):
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explicit casting from super class to subclass
... Dog dog = (Dog) animal; does not generate a compilation error, but at runtime it generates a ClassCastException . Why can't the compiler detect this error?
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Best way to work with dates in Android SQLite [closed]
...es within SQLite.
Storing dates in UTC format, the default if you use datetime('now') (yyyy-MM-dd HH:mm:ss) will then allow sorting by the date column.
Retrieving dates as strings from SQLite you can then format/convert them as required into local regionalised formats using the Calendar or the and...