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Selectors in Objective-C?
...respondToSelector to see if the receiver implements that method. Can someone offer up a better explanation?
8 Answers
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Regular expression for matching latitude/longitude coordinates?
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This one will strictly match latitude and longitude values that fall within the correct range:
^[-+]?([1-8]?\d(\.\d+)?|90(\.0+)?),\s*[-+]?(180(\.0+)?|((1[0-7]\d)|([1-9]?\d))(\.\d+)?)$
Matches
+90.0, -127.554334
45, 180
-90, ...
Remove empty array elements
...ore filtering it? I think setting a the second time just resets the first one.
– Cullub
Jan 31 '16 at 0:10
5
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Technically what is the main difference between Oracle JDK and OpenJDK? [duplicate]
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Technical differences are a consequence of the goal of each one (OpenJDK is meant to be the reference implementation, open to the community, while Oracle is meant to be a commercial one)
They both have "almost" the same code of the classes in the Java API; but the code for the virtua...
How can I reverse the order of lines in a file?
... mentioning: tac (the, ahem, reverse of cat). Part of coreutils.
Flipping one file into another
tac a.txt > b.txt
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MySQL error code: 1175 during UPDATE in MySQL Workbench
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I mentioned that I already disabled the safe update option from the GUI which have the same effect as id I typed the command. However, thanks for your answer, but I already answered my question. Check my answer to know what was the ...
Is there a typical state machine implementation pattern?
... Very nice way to get started, at least beginning point for me. One remark, the first line of run_state() has a naughty "." that shouldn't be there.
– Atilla Filiz
Jun 22 '10 at 14:29
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Difference between jQuery `click`, `bind`, `live`, `delegate`, `trigger` and `on` functions (with an
...is irrelevant...the event is bound and it's staying until that element is gone, or the handler is removed via .unbind().
Yet another common use for .live() and .delegate() is performance. If you're dealing with lots of elements, attaching a click handler directly to each element is expensive and t...
How to implement Enums in Ruby?
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I'm surprised that no one has offered something like the following (harvested from the RAPI gem):
class Enum
private
def self.enum_attr(name, num)
name = name.to_s
define_method(name + '?') do
@attrs & num != 0
end
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C# - Multiple generic types in one list
...nor does it prevent a developer from shooting themselves in the foot by erroneously adding some non-MetaData object to the list. By using a List<MetaData> it is understood what the list should contain. Most likely MetaData will have some public properties/methods that haven't been shown in th...