大约有 6,888 项符合查询结果（耗时：0.0315秒） [XML]
Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell
... + 1) (count + 2)
| otherwise = go (candidate + 1) count
nextTriangle index triangle
| factorCount triangle > 1000 = triangle
| otherwise = nextTriangle (index + 1) (triangle + index + 1)
main = print $ nextTriangle 1 1
EDIT: So now that we've explored that, lets address the quest...
How to create an array containing 1…N
... each element will be set to the result of callback.call(thisArg, element, index, array). Therefore, [undefined, undefined, …, undefined].map(Number.call, Number) would map each element to (Number.call).call(Number, undefined, index, array), which is the same as Number.call(undefined, index, arra...
Optimise PostgreSQL for fast testing
...greSQL 9.2 significantly improves the speed of TRUNCATE and of course adds index-only scans. Even minor releases should always be followed; see the version policy.
Don'ts
Do NOT put a tablespace on a RAMdisk or other non-durable storage.
If you lose a tablespace the whole database may be damaged ...
undefined method `source_index' for Gem:Module (NoMethodError)
...n 2.0.2 for me, and 1.9.3-p327 has RubyGems v1.8.23 installed.
Gem.source_index has been deprecated for a while, but since Rails 2.3 is not getting any updates except critical security patches, this will never get fixed. RubyGems v2.0 finally removed that method. Downgrade to any rubygems version p...
How can I get the current stack trace in Java?
...
The first element (index 0) in the array is the java.lang.Thread.getStackTrace method, the second (index 1) usually is the first of interest.
– lilalinux
Feb 5 '14 at 13:16
...
How to add multiple files to Git at the same time
...ed path
1: unchanged +0/-1 TODO
2: unchanged +1/-1 index.html
3: unchanged +5/-1 lib/simplegit.rb
*** Commands ***
1: status 2: update 3: revert 4: add untracked
5: patch 6: diff 7: quit 8: help
What now>
If you press 2 th...
How to get the first element of an array?
... This assumes that the first element in the array is always has an index of 0. You know what they say about assumption...
– Andy
Aug 9 '15 at 16:19
16
...
How do I install from a local cache with pip?
...seriously flawed? If you don't want PyPI to be reachable, that's what --no-index is for; a download cache is surely orthogonal to reaching PyPI or not!
– lvh
Dec 1 '13 at 11:51
...
Define: What is a HashSet?
...It does so by internally managing an array and storing the object using an index which is calculated from the hashcode of the object. Take a look here
HashSet is an unordered collection containing unique elements. It has the standard collection operations Add, Remove, Contains, but since it uses a h...
Iterate a list as pair (current, next) in Python
...ng this out, I’m very surprised no one has thought of enumerate().
for (index, thing) in enumerate(the_list):
if index < len(the_list):
current, next_ = thing, the_list[index + 1]
#do something
sha...