jdelafon

qs = qs.extra(
  select={'key_is_null': sort_key+' IS NULL'},
  order_by = ['-key_is_null', sort_key]
)

jdelafon

/**
 * It is actually possible to trigger a download upon return from a GET or POST Ajax request.
 * Source: http://stackoverflow.com/questions/16086162/handle-file-download-from-ajax-post/23797348#23797348
 * Here with jQuery $ajax().
 **/

$.ajax({...})
.then(function(response, status, xhr) {
    /* Check for a filename */
    var filename = "";

jdelafon

def readable_size(num):
    """Change number of bytes to human-readable file size"""
    for unit in ['','K','M','G','T','P','E','Z']:
        if abs(num) < 1024.0:
            return "%3.1f%sB" % (num, unit)
        num /= 1024.0
    return "%.1f%s%s" % (num, 'Yi', 'B')

jdelafon

#!/usr/bin/env julia

// Attempt to implement simple homomorphic encryption

function generate_key(N=20)
    key = rand(0:1, N)
    while countnz(key) == 0     # on ne veut pas une cle avec 0 partout
        key = rand(0:1, N)
    end
    return key

jdelafon

# Hierholzer's algorithm for Eulerian graphs #
"""
EXAMPLE
V = [1,2,3,4,5,6]
E = [(1,2),(2,3),(3,4),(4,5),(5,6),(6,1),(2,6),(6,4),(4,2)]
returns [1, 2, 6, 4, 2, 3, 4, 5, 6, 1]

V = ["AA","AB","BC","CD","DE","EF"]
E = [("AA","AB"),("AB","BC"),("BC","CD"),("CD","DE"),("DE","EF"),("EF","AA"),("AB","EF"),("EF","CD"),("CD","AB")]

jdelafon

# Deep search algorithm to find an Hamiltonian path in a graph
# (visiting every edge once and only once)
"""
EXAMPLES

V = ['AA','AB','BC','CD','DE','EF']
E = [('AA','AB'),('AB','BC'),('BC','CD'),('CD','DE'),('DE','EF'),('EF','AA'),('AB','EF'),('EF','CD'),('CD','AB')]
returns [['AA','AB','BC','CD','DE','EF'], ['AB','BC','CD','DE','EF','AA'], ['BC','CD','DE','EF','AA','AB'],
         ['CD','DE','EF','AA','AB','BC'], ['DE','EF','AA','AB','BC','CD'], ['EF','AA','AB','BC','CD','DE']]

jdelafon

"""
A Python implementation of NNLS algorithm

References:
[1]  Lawson, C.L. and R.J. Hanson, Solving Least-Squares Problems, Prentice-Hall, Chapter 23, p. 161, 1974.

Contributed by Klaus Schuch (schuch@igi.tugraz.at)
based on MATLAB's lsqnonneg function

"""

jdelafon

set.seed(100)
data = c(rnorm(1000,mean=2,sd=1),rnorm(400,mean=6,sd=1.5))

# linear
plot(sample(data), rep(0,length(data)), pch=4)

# with hist
hist(data, freq=FALSE, breaks=100)
points(sample(data), rep(0,length(data)), pch=4)

jdelafon

/**
 * Return a Map[String,Any] of the field -> value pairs of the attributes of a class `c`.
 */
def classToMap(c: AnyRef): Map[String, Any] =
  // 'fold' syntax, starting with an empty map
  (Map[String, Any]() /: c.getClass.getDeclaredFields) {(a, f) =>
  f.setAccessible(true)
  a + (f.getName -> f.get(c))
}

jdelafon

import java.io.FileInputStream
import java.nio.file.Paths
import play.api.http.HttpEntity

import akka.stream.scaladsl.StreamConverters
import play.api.mvc._
import play.api.http.MimeTypes._
import play.api.http.HeaderNames._
import play.api.http.Status._