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What is the purpose of “!” and “?” at the end of method names?
...e method is going to return a boolean and the ! modifies the object it was called on. They are there to improve readability when looking at the code.
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Return anonymous type results?
.... We might also see some much simpler code where we just want a tuple, basically. Not everything needs to be an object with complex behaviour. Sometimes "just the data" is the Right Thing. IMO, of course.
– Jon Skeet
Feb 10 '09 at 23:18
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jQuery map vs. each
...d in the map function. You will have to supply the first parameter in the callback (eg we used i above). Ironically, the callback arguments used in the each method are the reverse of the callback arguments in the map function so be careful.
map(arr, function(elem, index) {});
// versus
each(arr,...
How to test if list element exists?
...ect exist. The string "foo$a" is interpreted literary: Is there a variable called "foo$a"? ...and the answer is FALSE...
foo <- list(a=42, b=NULL) # variable "foo" with element "a"
"bar$a" <- 42 # A variable actually called "bar$a"...
ls() # will include "foo" and "bar$a"
exists("foo$a") #...
Git pull from another repository
I have a repository called Generic , which is a generic application. I have forked it into a repository called Acme , which just builds upon the application stored Generic repository and adds Acme Co branding to it.
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How to check whether an object has certain method/property?
Using dynamic pattern perhaps? You can call any method/property using the dynamic keyword, right? How to check whether the method exist before calling myDynamicObject.DoStuff(), for example?
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Daylight saving time and time zone best practices [closed]
...ons() - see answer. To keep PHP with up to date Olson data, install periodically the timezonedb PECL package; see answer.
If using C++, be sure to use a library that uses the properly implements the IANA timezone database. These include cctz, ICU, and Howard Hinnant's "tz" library.
Do not use Boo...
HTML anchor link - href and onclick both?
.... Lately I've had to revise all those pages as @Amber advised... to specifically return false, if I don't want the page to jump.
– Randy
Aug 12 '15 at 14:44
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jQuery check if an input is type checkbox?
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You can use the pseudo-selector :checkbox with a call to jQuery's is function:
$('#myinput').is(':checkbox')
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Strip html from string Ruby on Rails
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Yes, call this: sanitize(html_string, tags:[])
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