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defaultdict of defaultdict?
Is there a way to have a defaultdict(defaultdict(int)) in order to make the following code work?
6 Answers
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Getting individual colors from a color map in matplotlib
...
In order to get rgba integer value instead of float value, we can do
rgba = cmap(0.5,bytes=True)
So to simplify the code based on answer from Ffisegydd, the code would be like this:
#import colormap
from matplotlib import cm...
Error :Request header field Content-Type is not allowed by Access-Control-Allow-Headers
... extra header. Try prepending the following to your file if you are using PHP:
header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
Make sure that you haven't already used header in another file, or you will get a nasty...
What is the most efficient way to concatenate N arrays?
...further to
a.push(...b)
However, it seems that for large arrays (of the order of 100,000 members or more), the technique passing an array of elements to push (either using apply() or the ECMAScript 2015 spread operator) can fail. For such arrays, using a loop is a better approach. See https://sta...
Check whether an input string contains a number in javascript
...It checks for string contain both letters and numbers only of any sequence order.
Example:
function matchExpression( str ) {
var rgularExp = {
contains_alphaNumeric : /^(?!-)(?!.*-)[A-Za-z0-9-]+(?<!-)$/,
containsNumber : /\d+/,
containsAlphabet : /[a-zA-Z]/,
...
What is “loose coupling?” Please provide examples
... CartContents class to keep track of the items in the shopping cart and an Order class for processing a purchase. The Order needs to determine the total value of the contents in the cart, it might do that like so:
Tightly Coupled Example:
public class CartEntry
{
public float Price;
public...
Sorting HashMap by values [duplicate]
... it works fine for me. You can choose both Ascending as well as descending order
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry...
Factory Pattern. When to use factory methods?
...l object you are trying to create relies on several other objects. E.g, in PHP: Suppose you have a House object, which in turn has a Kitchen and a LivingRoom object, and the LivingRoom object has a TV object inside as well.
The simplest method to achieve this is having each object create their chi...
Sort a text file by line length including spaces
... such lines being sorted against each other, and keep them in the relative order in which they occur in the input.
(Those who want more control of sorting these ties might look at sort's --key option.)
Why the question's attempted solution fails (awk line-rebuilding):
It is interesting to note th...
How to convert an OrderedDict into a regular dict in python3
I am struggling with the following problem:
I want to convert an OrderedDict like this:
8 Answers
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