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Should I use 'has_key()' or 'in' on Python dicts?
...ormance, e.g.:
$ python -mtimeit -s'd=dict.fromkeys(range(99))' '12 in d'
10000000 loops, best of 3: 0.0983 usec per loop
$ python -mtimeit -s'd=dict.fromkeys(range(99))' 'd.has_key(12)'
1000000 loops, best of 3: 0.21 usec per loop
While the following observation is not always true, you'll notice...
How to create a GUID/UUID using iOS
...
100
Here is the simple code I am using, compliant with ARC.
+(NSString *)getUUID
{
CFUUIDRef ...
Build Eclipse Java Project from Command Line
...ions/Eclipse.app/Contents/Eclipse/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -noSplash -data "workspace" -application org.eclipse.jdt.apt.core.aptBuild
The -data parameter specifies the location of your workspace.
The version number for the equinox launcher will depend on wha...
One-liner to check whether an iterator yields at least one element?
...iter. You can test that any stops at first success easily: run any((x > 100 for x in xrange(10000000))) and then run any((x > 10000000 for x in xrange(100000000))) -- the second should take much longer.
– chbrown
Apr 18 '12 at 19:53
...
When should I use Struct vs. OpenStruct?
...
Other benchmark:
require 'benchmark'
require 'ostruct'
REP = 100000
User = Struct.new(:name, :age)
USER = "User".freeze
AGE = 21
HASH = {:name => USER, :age => AGE}.freeze
Benchmark.bm 20 do |x|
x.report 'OpenStruct slow' do
REP.times do |index|
OpenStruct.new(:na...
Get the latest record from mongodb collection
...ze data which often leads to multiple writes. Of course, if you get 10x or 100x write throughput (which I've seen), then 2x or 3x the writes is still a big improvement.
– Gates VP
Jun 7 '12 at 18:46
...
How to see full query from SHOW PROCESSLIST
When I issue SHOW PROCESSLIST query, only first 100 characters of the running SQL query are returned in the info column.
5 ...
Is gcc std::unordered_map implementation slow? If so - why?
...remember correctly, unordered_map defaults to (smallest prime larger than) 100.
I didn't have chrono on my system, so I timed with times().
template <typename TEST>
void time_test (TEST t, const char *m) {
struct tms start;
struct tms finish;
long ticks_per_second;
times(&am...
How do I find the duplicates in a list and create another list with them?
... seen_add(item)
return list(seen2)
l = [1,2,3,2,1,5,6,5,5,5]*100
Here are the results: (well done @JohnLaRooy!)
$ python -mtimeit -s 'import test' 'test.JohnLaRooy(test.l)'
10000 loops, best of 3: 74.6 usec per loop
$ python -mtimeit -s 'import test' 'test.moooeeeep(test.l)'
10000 l...
How do I use PHP namespaces with autoload?
...
+100
Class1 is not in the global scope.
See below for a working example:
<?php
function __autoload($class)
{
$parts = explode('...