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How to hash some string with sha256 in Java?
...binary data, and if you want to represent that in a string, you should use base64 or hex... don't try to use the String(byte[], String) constructor.
e.g.
MessageDigest digest = MessageDigest.getInstance("SHA-256");
byte[] hash = digest.digest(text.getBytes(StandardCharsets.UTF_8));
...
What is the bit size of long on 64-bit Windows?
...abandoned in favour of LP64 (that is, almost all later entrants used LP64, based on the recommendations of the Aspen group; only systems with a long heritage of 64-bit operation use a different scheme). All modern 64-bit Unix systems use LP64. MacOS X and Linux are both modern 64-bit systems.
Micr...
Unit testing code with a file system dependency
...ing a bit more interesting going on with a file and you wanted to save the Base64 encoded contents of a byte[] to a file. You can use streams for this to test that your code does the right thing without having to check how it does it. One example might be something like this (in Java):
interface St...
Send attachments with PHP Mail()?
...age';
$content = file_get_contents($file);
$content = chunk_split(base64_encode($content));
// a random hash will be necessary to send mixed content
$separator = md5(time());
// carriage return type (RFC)
$eol = "\r\n";
// main header (multipart mandatory)
$header...
How to take screenshot of a div with JavaScript?
... 0, 0, 100, 100, function(data) {
// in the data variable there is the base64 image
// exmaple for displaying the image in an <img>
$("img#captured").attr("src", "data:image/png;base64,"+data);
});
Keep in mind console.log() and alert() won´t generate output if the size of the i...
Can I get Memcached running on a Windows (x64) 64bit environment?
...ave released a build of memcached 1.4.4 for Windows x64:
http://blog.couchbase.com/memcached-windows-64-bit-pre-release-available
http://labs.northscale.com/memcached-packages/
UPDATE: they have recently released Memcached Server - still FREE but enhanced distro with clustering, web-based admin/s...
App Inventor 2 列表代码块 · App Inventor 2 中文网
...除首个元素的列表
去除末尾元素的列表
截取列表
拓展案例：
案例：列表遍历
案例：列表转JSON
案例：JSON转列表
案例：去除列表重复项（列表去重）
案例：将一个列表等于另一个列表（列表赋值）
案例：判断...
Java 32-bit vs 64-bit compatibility
...
All byte code is 8-bit based. (That's why its called BYTE code) All the instructions are a multiple of 8-bits in size.
We develop on 32-bit machines and run our servers with 64-bit JVM.
Could you give some detail of the problem you are facing? T...
How to multiply duration by integer?
...
It works because constants have an adaptive type, based on how they are used. See this blog post by Rob Pike that explains it in detail: blog.golang.org/constants
– mna
Aug 28 '15 at 14:12
...
Use HTML5 to resize an image before upload
...vert a canvas to a BLOB */
var dataURLToBlob = function(dataURL) {
var BASE64_MARKER = ';base64,';
if (dataURL.indexOf(BASE64_MARKER) == -1) {
var parts = dataURL.split(',');
var contentType = parts[0].split(':')[1];
var raw = parts[1];
return new Blob([raw],...