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Change text color based on brightness of the covered background area?
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If you are using ES6, convert hex to RGB then can use this:
const hexToRgb = hex => {
// turn hex val to RGB
const result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex)
return result
? {
r: parseInt(r...
Replace non-ASCII characters with a single space
...t'll pass over the values twice), and a generator expression will first be converted to one. Giving it a list comprehension is simply faster. See this post.
– Martijn Pieters♦
Nov 19 '13 at 18:42
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How to get a group of toggle buttons to act like radio buttons in WPF?
...Style>
Then you can use the SelectionMode property of the ListBox to handle SingleSelect vs MultiSelect.
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How much is the overhead of smart pointers compared to normal pointers in C++?
...11? In other words, is my code going to be slower if I use smart pointers, and if so, how much slower?
5 Answers
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Google Gson - deserialize list object? (generic type)
... hassle with the Type object, and if you really need a list you can always convert the array to a list by:
List<MyClass> mcList = Arrays.asList(mcArray);
IMHO this is much more readable.
And to make it be an actual list (that can be modified, see limitations of Arrays.asList()) then just d...
How to read the RGB value of a given pixel in Python?
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photo = Image.open('IN.jpg') #your image
photo = photo.convert('RGB')
width = photo.size[0] #define W and H
height = photo.size[1]
for y in range(0, height): #each pixel has coordinates
row = ""
for x in range(0, width):
RGB = photo.getpixel((x,y))
R,G,...
Use of var keyword in C#
...eadable in some cases. If I have a Customer class with an Orders property, and I want to assign that to a variable, I will just do this:
var orders = cust.Orders;
I don't care if Customer.Orders is IEnumerable<Order>, ObservableCollection<Order> or BindingList<Order> - all I wan...
Is it better to use std::memcpy() or std::copy() in terms to performance?
...ll have a slight, almost imperceptible performance loss. I just did a test and found that to be untrue: I did notice a performance difference. However, the winner was std::copy.
I wrote a C++ SHA-2 implementation. In my test, I hash 5 strings using all four SHA-2 versions (224, 256, 384, 512), and ...
Best JavaScript compressor [closed]
... sometimes be the worst compressor (output even larger than original) - it converts non-ascii characters in strings to \uxxxx literals by default.. use e.g. --charset UTF-8 (if you're sure you let the browser know about it somehow)
– mykhal
Feb 15 '12 at 9:35
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Copying files from one directory to another in Java
...directory, dir, with text files. I iterate over the first 20 files in dir, and want to copy them to another directory in the dir directory, which I have created right before the iteration.
In the code, I want to copy the review (which represents the ith text file or review) to trainingDir . How c...