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How can I convert an image into Base64 string using JavaScript?
...on firefox 35 on some images, the base64 is different from the base64 that php creates on the same image.
– hanshenrik
Mar 6 '15 at 2:39
1
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How to check if hex color is “too black”?
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I found this WooCommerce Wordpress PHP function (wc_hex_is_light) and I converted to JavaScript. Works fine!
function wc_hex_is_light(color) {
const hex = color.replace('#', '');
const c_r = parseInt(hex.substr(0, 2), 16);
const c_g = parseInt(hex...
How to detect when an Android app goes to the background and come back to the foreground
...rocess had been showing a user interface, and is no longer doing so. Large allocations with the UI should be released at this point to allow memory to be better managed.
Of course, you should implement this to actually do what it says (purge memory that hasn't been used in certain time, clear some...
Check if a program exists from a Makefile
...some of the existing solutions here...
REQUIRED_BINS := composer npm node php npm-shrinkwrap
$(foreach bin,$(REQUIRED_BINS),\
$(if $(shell command -v $(bin) 2> /dev/null),$(info Found `$(bin)`),$(error Please install `$(bin)`)))
The $(info ...) you can exclude if you want this to be quiete...
Which Java Collection should I use?
...ndex, you access them by their key, which is any object. Like the array in PHP :)
Data in Map are searchable by their key.
Typical operation: get an element by its ID (where ID is of any type, not only int as in case of List).
The differences
Set vs. Map: in Set you search data by themselves, whi...
Is non-blocking I/O really faster than multi-threaded blocking I/O? How?
...though threads are relatively easy to create and use, the operating system allocates a significant amount of time and other resources to manage them."
CreateThread documentation on MSDN says "However, your application will have better performance if you create one thread per processor and build queu...
What are the differences between the threading and multiprocessing modules?
...faster to create and manage than processes (because the OS doesn't need to allocate a whole new virtual memory area), and inter-thread communication is usually faster than inter-process communication. But threads are harder to program. Threads can interfere with one another, and can write to each ot...
“Origin null is not allowed by Access-Control-Allow-Origin” error for request made by application ru
...d to maybe add a HEADER in your called script, here is what I had to do in PHP:
header('Access-Control-Allow-Origin: *');
More details in Cross domain AJAX ou services WEB (in French).
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im...
Popstate on page's load in Chrome
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window.history.ready = true;
history.pushState(state, null, 'content.php?id='+ nextPageId);
// ajax in content instead of loading server-side
}
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Get average color of image via Javascript
...ogle it.
I have accomplished the above execution in RGB color space using PHP/GD here: https://gist.github.com/cf23f8bddb307ad4abd8
This however is very computationally expensive. It will crash your system on large images, and will definitely crash your browser if you try it in the client. I have ...