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How many String objects will be created when using a plus sign?
... resulting IL.
Keep in mind that there may be further optimizations at runtime. I'm just going by what IL is produced.
Finally, as regards interning, constants and literals are interned, but the value which is interned is the resulting constant value in the IL, not the literal. This means that y...
Is there a simple way to remove multiple spaces in a string?
...used 11 paragraphs, 1000 words, 6665 bytes of Lorem Ipsum to get realistic time tests and used random-length extra spaces throughout:
original_string = ''.join(word + (' ' * random.randint(1, 10)) for word in lorem_ipsum.split(' '))
The one-liner will essentially do a strip of any leading/trailin...
When to Redis? When to MongoDB? [closed]
...g to query your data.
MongoDB is suited for Hackathons, startups or every time you don't know how you'll query the data you inserted. MongoDB does not make any assumptions on your underlying schema. While MongoDB is schemaless and non-relational, this does not mean that there is no schema at all. I...
Quick Way to Implement Dictionary in C
...e that if the hashes of two strings collide, it may lead to an O(n) lookup time. You can reduce the likelihood of collisions by increasing the value of HASHSIZE. For a complete discussion of the data structure, please consult the book.
...
How to convert a char to a String?
...de(Mode.Throughput)
@Fork(1)
@State(Scope.Thread)
@Warmup(iterations = 10, time = 1, batchSize = 1000, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 10, time = 1, batchSize = 1000, timeUnit = TimeUnit.SECONDS)
public class CharToStringConversion {
private char c = 'c';
@Benchmark
...
`date` command on OS X doesn't have ISO 8601 `-I` option?
In a Bash script, I want to print the current datetime in ISO 8601 format (preferably UTC), and it seems that this should be as simple as date -I :
...
How to render a DateTime object in a Twig template
One of my fields in one of my entities is a "datetime" variable.
9 Answers
9
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scala vs java, performance and memory? [closed]
...rmance, but it depends on the specifics.)
I should add that per amount of time spent programming, my Scala code is usually faster than my Java code since in Scala I can get the tedious not-performance-critical parts done with less effort, and spend more of my attention optimizing the algorithms and...
Accessing items in an collections.OrderedDict by index
...()))
('foo', 'one')
>>> next(iter(d.values()))
'one'
(The first time you say "next()", it really means "first.")
In my informal test, next(iter(d.items())) with a small OrderedDict is only a tiny bit faster than items()[0]. With an OrderedDict of 10,000 entries, next(iter(d.items())) wa...
Negative weights using Dijkstra's Algorithm
...ights but without negative cycles.
However, in this case, the asymptotic time bound of dijkstra for graphs without negative cycles is lost. This is because a previously settled node can be reinserted into the heap when a better distance is found due to negative weights. This property is called lab...