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Does Javascript pass by reference? [duplicate]
...cript!
Call-by-Value
Primitive types are passed by-value:
var num = 123, str = "foo";
function f(num, str) {
num += 1;
str += "bar";
console.log("inside of f:", num, str);
}
f(num, str);
console.log("outside of f:", num, str);
Reassignments inside a function scope are ...
Detect if device is iOS
I'm wondering if it's possible to detect whether a browser is running on iOS, similar to how you can feature detect with Modernizr (although this is obviously device detection rather than feature detection).
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Install autoreconf on OS X v10.7 (Lion)?
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brew isn't included with OSX, but you can get it here: mxcl.github.com/homebrew
– RobM
Apr 25 '12 at 11:45
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How can I find the version of the Fedora I use?
...d the login banners … I typically edit mine, and so, it seems, do many (most) corporate IT departments... :-(
– BRPocock
Dec 2 '11 at 16:05
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Difference between filter and filter_by in SQLAlchemy
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Be careful when using .filter. a query like id=12345, query(users).filter(id == id) will not filter on users.id. Instead, it will evaluate id == id as True and return all users. You need to use .filter(users.id == id) (as demoed above). I made this mistake earlier today.
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How to kill an Android activity when leaving it so that it cannot be accessed from the back button?
...s, all you need to do is call finish() in any Activity you would like to close.
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How to recognize USB devices in Virtualbox running on a Linux host? [closed]
...ct the guest from the Virtualbox home (I'm using a Windows XP 3 guest), choose Settings -> USB -> Add filter from device, no devices is listed, even if an USB pen is attached and recognized by my Lubuntu 13.10. If i run the guest, nothing happens if I attach the device and, as above, no USB device i...
How to set NODE_ENV to production/development in OS X
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Refer to npmjs.com/package/cross-env for a simple cross-platform solution. cross-env NODE_ENV=production works on windows and linux / mac.
– AntonB
Jun 4 '16 at 13:55
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What is a method group in C#?
...) overload which takes a string parameter:
Func<string,string> fn = 123.ToString;
Console.WriteLine(fn("00000000"));
This example picks the ToString() overload which takes no parameters:
Func<string> fn = 123.ToString;
Console.WriteLine(fn());
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How does delete[] know it's an array?
...lly, using delete[] to delete something created with new is exploitable. taossa.com/index.php/2007/01/03/…
– Rodrigo
Apr 24 '09 at 13:20
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