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What is the optimal Jewish toenail cutting algorithm?
...lements in the list differ by at least two.
def isValid(seq):
for i in range(len(seq)-1):
a = seq[i]
b = seq[i+1]
if abs(a-b) == 1:
return False
return True
from itertools import ifilter, permutations
validseqs = ifilter(isValid, permutations([1,2,3,4,5]...
Checking if form has been submitted - PHP
...ou can use hash) Ex:
$token = hash (string $algo , string $data [, bool $raw_output = FALSE ] );
Assign this token to a session variable. Ex:
$_SESSION['form_token'] = $token;
Add a hidden input to submit the token. Ex:
input type="hidden" name="token" value="{$token}"
then as part of your ...
Python: changing value in a tuple
...ples (on Python 3.3), concatenation is actually faster!
In [3]: d = tuple(range(10))
In [4]: %timeit replace_at_index1(d, 5, 99)
1000000 loops, best of 3: 872 ns per loop
In [5]: %timeit replace_at_index2(d, 5, 99)
1000000 loops, best of 3: 642 ns per loop
Yet if we look at longer tuples, list ...
Is there a replacement for unistd.h for Windows (Visual C)?
...a
* common MinGW API in libmingwex.a, providing for suspension periods
* ranging from mean values of ~7.5 milliseconds, (see the comments in
* <time.h>), extending up to a maximum of ~136 years.
*
* Note that, whereas POSIX supports early wake-up of any suspended
* process/thread, in res...
How do I determine k when using k-means clustering?
...klearn.cluster import KMeans
from sklearn.metrics import silhouette_score
range_n_clusters = [2, 3, 4] # clusters range you want to select
dataToFit = [[12,23],[112,46],[45,23]] # sample data
best_clusters = 0 # best cluster number which you will get
previous_silh_...
Google fonts URL break HTML5 Validation on w3.org
...
I would expect raw UTF-8 to be valid in UTF-8 encoded HTML without encoding other characters but those used for HTML e.g. &, " and '. And those special characters would need to be encoded by HTML rules (e.g. &amp etc). The user age...
Find if variable is divisible by 2
..., like creating variables, functions, etc., that is still being done with raw JavaScript. Just unbelievable ;-)
– Anurag
May 13 '10 at 9:10
...
How do I use IValidatableObject?
...idatableObject
{
[Required]
public bool Enable { get; set; }
[Range(1, 5)]
public int Prop1 { get; set; }
[Range(1, 5)]
public int Prop2 { get; set; }
public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
{
var results = n...
Print in one line dynamically
...ased on your code:
from sys import stdout
from time import sleep
for i in range(1,20):
stdout.write("\r%d" % i)
stdout.flush()
sleep(1)
stdout.write("\n") # move the cursor to the next line
Some things about this that may be surprising:
The \r goes at the beginning of the string so ...
Getting the SQL from a Django QuerySet [duplicate]
...cepted answer did not work for me when using Django 1.4.4. Instead of the raw query, a reference to the Query object was returned: <django.db.models.sql.query.Query object at 0x10a4acd90>.
The following returned the query:
>>> queryset = MyModel.objects.all()
>>> queryset...