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Convert tuple to list and back
...amylak)
tuple(itertools.imap(tuple, edited))
You can also use a numpy array:
>>> a = numpy.array(level1)
>>> a
array([[1, 1, 1, 1, 1, 1],
[1, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 1],
[1, 1, 1, 1, 1, 1]])
...
Can we write our own iterator in Java?
...ce Iterable and override the method iterator().
Here's an example of a an ArrayList like class implementing the interface, in which you override the method Iterator().
import java.util.Iterator;
public class SOList<Type> implements Iterable<Type> {
private Type[] arrayList;
p...
Visibility of global variables in imported modules
...aredstuff as shared
and some other modules that actually populated these arrays. These are called by the main module. When exiting these other modules I can clearly see that the arrays are populated. But when reading them back in the main module, they were empty. This was rather strange for me (we...
get list from pandas dataframe column
...t;class 'list'>
col_one_arr:
[ 1. 2. 3. nan]
type:<class 'numpy.ndarray'>
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Performance of Find() vs. FirstOrDefault() [duplicate]
...his._items[index];
}
return default (T);
}
So it's iterating over an array of items which makes sense, since a list is a wrapper on an array.
However, FirstOrDefault, on the Enumerable class, uses foreach to iterate the items. This uses an iterator to the list and move next. I think what you...
How to concatenate string variables in Bash
...tring, but also an integer
echo $a
24
((a+=12))
echo $a
36
Append to an array var+=(...)
Our a is also an array of only one element.
echo ${a[@]}
36
a+=(18)
echo ${a[@]}
36 18
echo ${a[0]}
36
echo ${a[1]}
18
Note that between parentheses, there is a space separated array. If you want to sto...
Repeat String - Javascript
...is old and and not terribly practical - it's just "clever" because it uses Array stuff to get
String things done. When I wrote "less process" I definitely meant
"less code" because, as others have noted in subsequent answers, it
performs like a pig. So don't use it if speed matters to you.
I...
浅谈Heatmap：网页热点图生成原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的数据，以Imagick为例，代码如下：
<?php
$coordinates = array();
for ($i = 0; $i < 1000; $i++) {
$coordinates[] = array(rand($i, 1000), rand($i, 1000));
}
$max_repeat = max(
array_count_values(
array_map(function($v) { return "{$v[0]}x{$v[1]}"; }, $coordin...
How to make ng-repeat filter out duplicate results
...n the collection and which field
// should be unique
// We assume an array of objects here
// NOTE: We are skipping any object which
// contains a duplicated value for that
// particular key. Make sure this is what
// you want!
return function (arr, targetField) {
var val...
Multiple inputs with same name through POST in php
... a form and get it processed
by the server simply by looping through the array of items with the
name "xyz".
Note that this is probably the wrong solution. Obviously, it depends on the data you are sending.
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