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How do I create delegates in Objective-C?
...ign it as the web view's delegate:
MyClass *instanceOfMyClass = [[MyClass alloc] init];
myWebView.delegate = instanceOfMyClass;
On the UIWebView side, it probably has code similar to this to see if the delegate responds to the webViewDidStartLoad: message using respondsToSelector: and send it if ...
App Inventor 2 接入百度网盘API · App Inventor 2 中文网
...我们的请求：Transfer-Encoding can’t be trunked.
而采用python或php自己写一个简单服务端是可以接受上传的文件的。
采用图片base64方案，也只能自己写服务端，然后解码，恢复文件，百度网盘也无法采用这种方案。
直接用python或curl...
Do try/catch blocks hurt performance when exceptions are not thrown?
...t; values can be discarded less aggressively -> less efficient register allocation)
– Daniel
Aug 2 '19 at 13:02
add a comment
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Is this a “good enough” random algorithm; why isn't it used if it's faster?
...have distinctly un-uniform output.
Inspired by this article about how bad php's rand() function is, I made some random matrix images using QuickRandom and System.Random. This run shows how sometimes the seed can have a bad effect (in this case favouring lower numbers) where as System.Random is pret...
Make copy of an array
...t src.clone() is more readable and has far less opportunity for error than allocating a new array and doing arraycopy. (And also happens to be fast.)
– Brian Goetz
Mar 17 at 14:03
...
Accessing localhost (xampp) from another computer over LAN network - how to?
...ig > Apache (httpd-xampp.conf)
Search for
<Directory "C:/xampp/phpMyAdmin">
AllowOverride AuthConfig
**Require local** Replace with **Require all granted**
ErrorDocument 403 /error/XAMPP_FORBIDDEN.html.var
</Directory>```
Go to xampp > config >...
Deleting a file in VBA
... has much more work to do. Additionally, avoid using "" in VB as it always allocates a new string. Use vbNullString instead as it is a constant and does not uses more memory.
– Renaud Bompuis
Nov 12 '14 at 2:25
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How to determine total number of open/active connections in ms sql server 2005
My PHP/MS Sql Server 2005/win 2003 Application occasionally becomes very unresponsive, the memory/cpu usage does not spike. If i try to open any new connection from sql management studio, then the it just hangs at the open connection dialog box.
how to deterime the total number of active connectio...
Pointer to pointer clarification
...one int* ip2. Like everything in the computer, these pointer variables get allocated somewhere in memory too. Lets assume they end up at the next adjacent addresses in memory, immediately after j. We set the pointers to contain the addresses of the variables previously allocated: ip1=&i; ("copy ...
Array to Hash Ruby
... @Kevin, the stack uses a small area of memory that the program allocates and reserves for certain specific operations. Most commonly, it is used to keep a stack of the methods that have been called so far. This is the origin of the term stack trace, and this is also why an infinitely rec...