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Convert an image to grayscale in HTML/CSS
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Update: I made this into a full GitHub repo, including JavaScript polyfill for IE10 and IE11: https://github.com/karlhorky/gray
I originally used SalmanPK's answer, but then created the variation below to eliminate the extra HTTP request required for the SVG file. The inline SVG wor...
how to replicate pinterest.com's absolute div stacking layout [closed]
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I wrote the Pinterest script. The ID's are unrelated to the layout, and are used for other interaction-related JS. Here's the base of how it works:
Beforehand:
Absolutely position the pin containers
Determine column width
Determine margin betwe...
Passing $_POST values with cURL
...cUrl PHP documentation page. It will help much more than just with example scripts.
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How to retrieve checkboxes values in jQuery
...t have the name "chkboxName" in comma separate string
And here is the javascript
function showSelectedValues()
{
alert($("input[name=chkboxName]:checked").map(
function () {return this.value;}).get().join(","));
}
Here is the HTML sample
<html>
<head>
</head>
<bo...
How does Facebook disable the browser's integrated Developer Tools?
...low down some attacks where users are tricked into pasting (malicious) JavaScript code into the browser console.
Just to be clear: trying to block hackers client-side is a bad idea in general;
this is to protect against a specific social engineering attack.
If you ended up in the test group and ar...
How to gracefully handle the SIGKILL signal in Java
...er watcher program watch for your main program to go away or use a wrapper script. You could do with this with a shell script that polled the ps command looking for your program in the list and act accordingly when it disappeared.
#!/usr/bin/env bash
java TestShutdownHook
wait
# notify your other ...
Markdown to create pages and table of contents?
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You could try this ruby script to generate the TOC from a markdown file.
#!/usr/bin/env ruby
require 'uri'
fileName = ARGV[0]
fileName = "README.md" if !fileName
File.open(fileName, 'r') do |f|
inside_code_snippet = false
f.each_line do |li...
Why is this program erroneously rejected by three C++ compilers?
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You could try the following python script. Note that you need to install PIL and pytesser.
from pytesser import *
image = Image.open('helloworld.png') # Open image object using PIL
print image_to_string(image) # Run tesseract.exe on image
To use it, do...
How to store arbitrary data for some HTML tags
I'm making a page which has some interaction provided by javascript. Just as an example: links which send an AJAX request to get the content of articles and then display that data in a div. Obviously in this example, I need each link to store an extra bit of information: the id of the article. The w...
Disabling browser caching for all browsers from ASP.NET
...o-cache headers to be sent for items that you'll probably want cached (JavaScript files, images, etc). I haven't tried it yet, but the OP's location (setting the headers in the ASP page itself) is probably better.
– Evan Haas
Aug 5 '13 at 17:00
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