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Read specific columns from a csv file with csv module?
...name.csv',dtype=str,delimiter='|',skiprows=1,usecols=(1,))
>>> b
array([' Adam ', ' Carl ', ' Adolf ', ' Den '],
dtype='|S7')
More easily you can use genfromtext:
b = np.genfromtxt(r'filepath\name.csv', delimiter='|', names=True,dtype=None)
>>> b['Name']
array([' Adam '...
ElasticSearch, Sphinx, Lucene, Solr, Xapian. Which fits for which usage? [closed]
...search params
$cl->SetMatchMode(SPH_MATCH_FULLSCAN);
$cl->SetArrayResult(TRUE);
$cl->setLimits(0, 1, 1);
# looking for the post (not searching a keyword)
$cl->SetFilter("safetag_crc32", array(crc32($safetag)));
# fetch results
$post = $cl->Query(null, "...
Input and Output binary streams using JERSEY?
...
I had to return a rtf file and this worked for me.
// create a byte array of the file in correct format
byte[] docStream = createDoc(fragments);
return Response
.ok(docStream, MediaType.APPLICATION_OCTET_STREAM)
.header("content-disposition","attachment; filename = d...
What is the !! (not not) operator in JavaScript?
...console.log(navigator.userAgent.match(/MSIE 8.0/));
// returns either an Array or null
But if you ⇒
console.log(!!navigator.userAgent.match(/MSIE 8.0/));
// returns either true or false
share
|
...
Diagnosing Memory Leaks - Allowed memory size of # bytes exhausted
... @patcoll This has nothing to do with memory leaks. This is simply the array pointer changing. Take a look here: prismnet.com/~mcmahon/Notes/arrays_and_pointers.html at version 3a.
– Harm Smits
Mar 4 '19 at 8:32
...
Java Generics (Wildcards)
...nds B {}
class D extends B {}
Then
List<? extends A> la;
la = new ArrayList<B>();
la = new ArrayList<C>();
la = new ArrayList<D>();
List<? super B> lb;
lb = new ArrayList<A>(); //fine
lb = new ArrayList<C>(); //will not compile
public void someMethod(Li...
Random float number generation
...resented in N3551 (see it live) :
#include <algorithm>
#include <array>
#include <iostream>
#include <random>
std::default_random_engine & global_urng( )
{
static std::default_random_engine u{};
return u ;
}
void randomize( )
{
static std::random_device rd{...
“Uncaught Error: [$injector:unpr]” with angular after deployment
... the code gets minified - to know what to inject. That's where the $inject array and the other mechanisms come into play.
– Ken Smith
Dec 9 '14 at 15:38
...
Resize image in PHP
...MP, IMAGETYPE_WEBP];
$type = exif_imagetype ($imagePath);
if (!in_array ($type, $types)) {
return null;
}
list ($width, $height) = getimagesize ($imagePath);
$outBool = in_array ($outExt, ['jpg', 'jpeg', 'png', 'gif', 'bmp', 'webp']);
switch ($type) {
case...
Determine what attributes were changed in Rails after_save callback?
...d of after_save, you'll be able to use this:
self.changed
it returns an array of all changed columns in this record.
you can also use:
self.changes
which returns a hash of columns that changed and before and after results as arrays
...