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What is the difference between Python's list methods append and extend?
...ctionary, it will append the key, and not the whole hash to the end of the array.
– Anthony
Mar 15 '19 at 14:53
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mongoDB/mongoose: unique if not null
... support for specifying multiple possible types, which can be passed as an array:
{ field: { $type: [ <BSON type1> , <BSON type2>, ... ] } }
which means that it allows the value to be of any of a number of multiple types when not null.
Therefore, if we want to allow the email field i...
How to create a density plot in matplotlib?
...*8 + [4.5]*3 + [5.5]*1 + [6.5]*8
sns.set_style('whitegrid')
sns.kdeplot(np.array(data), bw=0.5)
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Adding up BigDecimals using Streams
...iginal answer
Yes, this is possible:
List<BigDecimal> bdList = new ArrayList<>();
//populate list
BigDecimal result = bdList.stream()
.reduce(BigDecimal.ZERO, BigDecimal::add);
What it does is:
Obtain a List<BigDecimal>.
Turn it into a Stream<BigDecimal>
Call th...
How to handle initializing and rendering subviews in Backbone.js?
...s to be set at some point. PhoneListView holds child views of its own, an array of PhoneView entries.
So on to your actual question. I handle initialization and rendering differently based on the view type. I break my views into two types, Parent views and Child views.
The difference between th...
What is Full Text Search vs LIKE
... words (terms) are used as hash keys - each of which is associated with an array of documents the keys (terms) appears in. Its like this:
Document sets = {d1, d2, d3, d4, ... dn}
Term sets = {t1, t2, t3, .. tn}
Now term-document matrix (which term member of which document) can be represented as: ...
How to get a pixel's x,y coordinate color from an image?
...data;
Because you are only grabbing one pixel, pixelData is a four entry array containing the pixel's R, G, B, and A values. For alpha, anything less than 255 represents some level of transparency with 0 being fully transparent.
Here is a jsFiddle example: http://jsfiddle.net/thirtydot/9SEMf/869...
What is the purpose of the “Prefer 32-bit” setting in Visual Studio and how does it actually work?
... flag is set on the executable. The only 2GB restrictions I know are about array/allocation sizes that are limited by Int32 range (about 2GB).
– Alexei Levenkov
Aug 22 '12 at 5:56
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Performant Entity Serialization: BSON vs MessagePack (vs JSON)
...d of MessagePack vs BSON. BSON is faster at least if you have large binary arrays:
BSON writer: 2296 ms (243487 bytes)
BSON reader: 435 ms
MESSAGEPACK writer: 5472 ms (243510 bytes)
MESSAGEPACK reader: 1364 ms
Using C# Newtonsoft.Json and MessagePack by neuecc:
public class TestData
{
...
PHP: exceptions vs errors?
...>
</ul>
<? endif; ?>
<? if ( is_array( $ex->getTrace() ) ) : ?>
<h2>Stack trace:</h2>
<table class="trace">
<thead>
<tr>
<td>File</t...