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How to convert a byte array to a hex string in Java?
...
From the discussion here, and especially this answer, this is the function I currently use:
private static final char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray();
public static String bytesToHex(byte[] bytes) {
char[] hexChars = new char[bytes.length * 2...
How do you execute an arbitrary native command from a string?
...her path\file.ext"'
iex "& $command"
Likely, you could handle nearly all cases by detecting if the first character of the command string is ", like in this naive implementation:
function myeval($command) {
if ($command[0] -eq '"') { iex "& $command" }
else { iex $command }
}
But...
Cannot set property 'innerHTML' of null
Why do I get an error or Uncaught TypeError: Cannot set property 'innerHTML' of null?
I thought I understood innerHTML and had it working before.
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基于PECL OAuth打造微博应用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...出现HTTP 417错误。
详见：‘Expect’ header gives HTTP error 417
如果使用PHP Streams方式发送请求的话，缺省使用的是HTTP1.0版本，可以通过tcpdump命令来检测这种现象，大致方法如下：
shell> tcpdump -A host foo.com
此时，某些防火墙...
“Keep Me Logged In” - the best approach
...tf("New Account %s\n", $user);
}
} catch (Exception $e) {
printf("#Error %s\n", $e->getMessage());
}
Class Used
class RememberMe {
private $key = null;
private $db;
function __construct($privatekey) {
$this->key = $privatekey;
}
public function setDB(...
Const in JavaScript: when to use it and is it necessary?
...ure that contains information that will never change. If there is room for error, var should always be used. However, not all information that never changes in the lifetime of a program needs to be declared with const. If under different circumstances the information should change, use var to indica...
“Uncaught TypeError: Illegal invocation” in Chrome
... I've just copy-pasted your code and get the Illegal invocation error. Here's the screencast.
– Dan Dascalescu
Mar 10 '14 at 3:22
24
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UIScrollView Scrollable Content Size Ambiguity
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This error took me a while to track down, initially I tried pinning the ScrollView's size but the error message clearly says "content size". I made sure everything I pinned from the top of the ScrollView was also pinned to the bo...
What is the best way to dump entire objects to a log in C#?
So for viewing a current object's state at runtime, I really like what the Visual Studio Immediate window gives me. Just doing a simple
...
Check if my app has a new version on AppStore
...ictionary* lookup = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
if ([lookup[@"resultCount"] integerValue] == 1){
NSString* appStoreVersion = lookup[@"results"][0][@"version"];
NSString* currentVersion = infoDictionary[@"CFBundleShortVersionString"];
...