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Batch file to copy files from one folder to another folder
...might want /o or /x.
/y - don't prompt before overwriting existing files.
/z - if you think the copy might fail and you want to restart it, use this. It places a marker on each file as it copies, so you can rerun the xcopy command to pick up from where it left off.
If you think the xcopy might fai...
How do I convert datetime to ISO 8601 in PHP
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Regular Expression for alphanumeric and underscores
...string that contains only those characters (or an empty string), try
"^[a-zA-Z0-9_]*$"
This works for .NET regular expressions, and probably a lot of other languages as well.
Breaking it down:
^ : start of string
[ : beginning of character group
a-z : any lowercase letter
A-Z : any uppercase le...
Converting a string to a date in JavaScript
...tes as UTC and make computations as UTC.
To parse a date as UTC, append a Z - e.g.: new Date('2011-04-11T10:20:30Z').
To display a date in UTC, use .toUTCString(),
to display a date in user's local time, use .toString().
More info on MDN | Date and this answer.
For old Internet Explorer compatib...
Using “this” with class name
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CSS Box Shadow - Top and Bottom Only [duplicate]
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As Kristian has pointed out, good control over z-values will often solve your problems.
If that does not work you can take a look at CSS Box Shadow Bottom Only on using overflow hidden to hide excess shadow.
I would also have in mind that the box-shadow property can accep...
How to check if a specific key is present in a hash or not?
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Swift class introspection & generics
...ct of class type 'X' with a metatype value requires an '@required' initializer
Y().me()
^
<REPL>:3:7: note: selected implicit initializer with type '()'
class X {
^
It took me a while to figure out what this means… turns out it wants the class to have a @required init()
class...
Is It Possible to Sandbox JavaScript Running In the Browser?
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answered Oct 12 '08 at 7:35
Darius BaconDarius Bacon
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Java Try Catch Finally blocks without Catch
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