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What is an optional value in Swift?
...can be nil
If you try to set a non-optional variable to nil, you'll get an error.
var red: String = "Red"
red = nil // error: nil cannot be assigned to type 'String'
Another way of looking at optionals is as a complement to normal Swift variables. They are a counterpart to a variable which is guara...
What is the difference between `raise “foo”` and `raise Exception.new(“foo”)`?
...
Technically, the first raises a RuntimeError with the message set to "foo", and the second raises an Exception with the message set to "foo".
Practically, there is a significant difference between when you would want to use the former and when you want to use the...
jQuery Validate - require at least one field in a group to be filled
...te div instead of after all every field.
put in form validate script
showErrors: function(errorMap, errorList){
$("#form_error").html("Please fill out at least 1 field before submitting.");
this.defaultShowErrors();
},
add this somewhere in the page
<div class...
CreateProcess error=206, The filename or extension is too long when running main() method
I have this error in eclipse helios:
26 Answers
26
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Coredata Error “data: ”
... let arrayOfData = try context.fetch(request)
} catch {
// Handle the error!
}
Hope , it will help you . :)
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Where are my postgres *.conf files?
...------------------------------------------------------------------------
# ERROR REPORTING AND LOGGING
#------------------------------------------------------------------------------
# - Where to Log -
#log_destination = 'stderr' # Valid values are combinations of
# stderr,...
Getting “Lock wait timeout exceeded; try restarting transaction” even though I'm not using a transac
...ime, so you have to wait some process to be idle. If so you could get this error. Am I right?
– zhuguowei
Aug 4 '16 at 9:36
6
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how to edit .csproj file
... my .csproj file using .NET framework 4.0 MSBUILD.EXE file I am getting an error "lable01" not found in the current context of "website01.csproj"
...
Error :Request header field Content-Type is not allowed by Access-Control-Allow-Headers
...
As hinted at by this post Error in chrome: Content-Type is not allowed by Access-Control-Allow-Headers just add the additional header to your web.config like so...
<httpProtocol>
<customHeaders>
<add name="Access-Control-Allow...
Minimal web server using netcat
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From man for nc, -p description: It is an error to use this option in conjunction with the -l option
– sbeliakov
Nov 24 '16 at 14:59
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