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How can I convert an image into Base64 string using JavaScript?
...u can choose from:
1. Approach: FileReader
Load the image as blob via XMLHttpRequest and use the FileReader API to convert it to a dataURL:
function toDataURL(url, callback) {
var xhr = new XMLHttpRequest();
xhr.onload = function() {
var reader = new FileReader();
reader.onloa...
Rounding up to next power of 2
...bit value:
Round up to the next highest power of 2
unsigned int v; // compute the next highest power of 2 of 32-bit v
v--;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
v++;
The extension to other widths should be obvious.
...
What is the difference between t.belongs_to and t.references in rails?
...eUploader: {
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Downloading a file from spring controllers
...
public void getFile(
@PathVariable("file_name") String fileName,
HttpServletResponse response) {
try {
// get your file as InputStream
InputStream is = ...;
// copy it to response's OutputStream
org.apache.commons.io.IOUtils.copy(is, response.getOutputStream());...
Ruby: require vs require_relative - best practice to workaround running in both Ruby =1.
...gem so thought I'd share as it was inspired by this post.
https://github.com/appoxy/aws/blob/master/lib/awsbase/require_relative.rb
unless Kernel.respond_to?(:require_relative)
module Kernel
def require_relative(path)
require File.join(File.dirname(caller[0]), path.to_str)
end
e...
How do I programmatically determine operating system in Java?
...ava VM runs in
*
* please keep the notes below as a pseudo-license
*
* http://stackoverflow.com/questions/228477/how-do-i-programmatically-determine-operating-system-in-java
* compare to http://svn.terracotta.org/svn/tc/dso/tags/2.6.4/code/base/common/src/com/tc/util/runtime/Os.java
* http://w...
What exactly is RESTful programming?
...epresentational State Transfer) advocates that web applications should use HTTP as it was originally envisioned. Lookups should use GET requests. PUT, POST, and DELETE requests should be used for mutation, creation, and deletion respectively.
REST proponents tend to favor URLs, such as
http://myse...
How to fix “Headers already sent” error in PHP
...
No output before sending headers!
Functions that send/modify HTTP headers must be invoked before any output is made.
summary ⇊
Otherwise the call fails:
Warning: Cannot modify header information - headers already sent (output started at script:line)
Some functions modifying the...
ASP.NET MVC 3 - Partial vs Display Template vs Editor Template
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How can I add a key/value pair to a JavaScript object?
...
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