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Python argparse: default value or specified value
...nargs='?', const=1, type=int)
args = parser.parse_args()
print(args)
% test.py
Namespace(example=None)
% test.py --example
Namespace(example=1)
% test.py --example 2
Namespace(example=2)
nargs='?' means 0-or-1 arguments
const=1 sets the default when there are 0 arguments
type=int converts ...
Writing your own STL Container
...mp;, X<T,A>&); //optional
Also, whenever I make a container, I test with a class more or less like this:
#include <cassert>
struct verify;
class tester {
friend verify;
static int livecount;
const tester* self;
public:
tester() :self(this) {++livecount;}
tester...
Rails 3.1: Engine vs. Mountable App
...ns:
[--full] # Generate a rails engine with bundled Rails application for testing
[--mountable] # Generate mountable isolated application
This gives the impression that you use --full to create an "engine" and --mountable to create something else called a "mountable application", when in fact they...
List of Big-O for PHP functions
...ose who doubt that PHP array lookups are O(N), I've written a benchmark to test that (they are still effectively O(1) for most realistic values).
$tests = 1000000;
$max = 5000001;
for( $i = 1; $i <= $max; $i += 10000 ) {
//create lookup array
$array = array_fill( 0, $i, NULL );
...
How to count the number of files in a directory using Python
...
os.listdir() will be slightly more efficient than using glob.glob. To test if a filename is an ordinary file (and not a directory or other entity), use os.path.isfile():
import os, os.path
# simple version for working with CWD
print len([name for name in os.listdir('.') if os.path.isfile(name...
How to check if two arrays are equal with JavaScript? [duplicate]
...b[i])
return false;
return true;
}
Demo (not extensively tested):
var nineTen = new Float32Array(2);
nineTen[0]=9; nineTen[1]=10;
deepEquals(
[[1,[2,3]], 4, {a:5,b:6}, new Map([['c',7],['d',8]]), nineTen],
[[1,[2,3]], 4, {b:6,a:5}, new Map([['d',8],['c',7]]), nineTen]
)
...
How should the ViewModel close the form?
...iewModel? It's a bad idea to keep mutable state in global variables. Makes testing a nightmare, and testing is one of the reasons you would use MVVM in the first place.
– Joe White
May 3 '11 at 22:07
...
How can I find the data structure that represents mine layout of Minesweeper in memory?
...002EF0 lea eax, [ecx+2]
.text:01002EF3 test eax, eax
.text:01002EF5 push esi
.text:01002EF6 jz short loc_1002F11 ;
.text:01002EF6
.text:01002EF8 mov esi, edx
.text:01002EFA shl ...
Delete all documents from index/type without deleting type
...e/_delete_by_query
{
"query" : {
"match_all" : {}
}
}
I tested this query in Kibana and Elastic 5.5.2
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what is the best way to convert a json formatted key value pair to ruby hash with symbol as key?
...n/deserialization, which also preserves the format of the key:
YAML.load({test: {'test' => { ':test' => 5}}}.to_yaml)
=> {:test=>{"test"=>{":test"=>5}}}
Benefit of this approach it seems like a format that is better suited for REST services...
...