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ETag vs Header Expires
...request to the server at all. The closer you are to the Expires date, the more likely it is the client (or proxy) will make an HTTP request for that file from the server.
So really what you want to do is use BOTH headers - set the Expires header to a reasonable value based on how often the content...
How can I print a circular structure in a JSON-like format?
...on() { return 'whatever you think that is right'; }; (if you want anything more generic/specific, just try anything in the prototype tree: HTMLDivElement implements HTMLElement implements Element implements Node implements EventTarget; note: this may be browser-dependent, the previous tree is true f...
How many socket connections can a web server handle?
...n have hardware TCP offload engines, ASICs designed for this specific role more efficiently than a general purpose CPU.
Good software design choices
Asynchronous IO design will differ across Operating Systems and Programming platforms. Node.js was designed with asynchronous in mind. You should use P...
To ARC or not to ARC? What are the pros and cons? [closed]
...mall complications in bridging to Core Foundation code. There are slightly more complications in dealing with anything that treats an id as a void*. Things like C-arrays of id can take a little more thinking about to do correctly. Fancy handling of ObjC va_args can also cause trouble. Most things in...
BigDecimal - to use new or valueOf
... double value as accurately as possible. This will usually result in a lot more digits being stored than you want. Strictly speaking, it's more correct than valueOf(), but it's a lot less intuitive.
There's a nice explanation of this in the JavaDoc:
The results of this constructor can be somewh...
Multi-line string with extra space (preserved indentation)
...
Heredoc sounds more convenient for this purpose. It is used to send multiple commands to a command interpreter program like ex or cat
cat << EndOfMessage
This is line 1.
This is line 2.
Line 3.
EndOfMessage
The string after <<...
Where to place JavaScript in an HTML file?
...l downloads. The HTTP/1.1 specification suggests that browsers download no more than two components in parallel per hostname. If you serve your images from multiple hostnames, you can get more than two downloads to occur in parallel. While a script is downloading, however, the browser won't start an...
How to validate an email address using a regular expression?
...)+)\])
Here is diagram of finite state machine for above regexp which is more clear than regexp itself
The more sophisticated patterns in Perl and PCRE (regex library used e.g. in PHP) can correctly parse RFC 5322 without a hitch. Python and C# can do that too, but they use a different syntax fr...
iPhone Simulator - Simulate a slow connection?
...ou don’t have it.
Open Xcode and go to Xcode › Open Developer Tool › More Developer Tools…
Download Additional Tools for Xcode (matching your current Xcode version)
Open the downloaded disk image and double-click the Network Link Conditioner .prefpane under “Hardware” to install it.
...
How do I include a pipe | in my linux find -exec command?
...e of xargs would be, that you can speed it with modern multi core cpu even more up, by using the -P switch (-P 0).
– flolo
Nov 20 '08 at 23:03
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