typeof

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typeof usage for undefined variables

what is the best usage for the \"typeof\" JavaScript function? if (ty开发者_如何学Gopeof (myvar) == \'undefined\') {[详细]

2023-04-11 06:27 分类：问答
"is" - operator for Type

I use the \"is\" operator to find a certain class: for(int i=0; i<screens.Count; i++){ if(screen is ScreenBase){[详细]

2023-04-05 12:44 分类：问答
How to use StructureToPtr with F# Structure? Typeof trouble

I\'ve got structure : type OneDevice = { mutable id: System.UInt16 mutable typeDev: byte mutable portNum: byte[详细]

2023-04-01 14:26 分类：问答
boost::resulf_of or BOOST_TYPEOF in return value type

all! I\'m stuck with boost::result_of and BOOST_TYPEOF. I wanna use them for deducing return value type of method.[详细]

2023-03-29 14:41 分类：问答
How can I check to see if a value is a float in javascript [duplicate]

This question already has answers here: 开发者_Python百科How do I check that a number is float or integer?[详细]

2023-03-25 15:17 分类：问答
Does a matter whether a value is primitive or boxed

One can use typeof to determine whether a value is primitive or boxed. Consider: typeof \"foo\"; // \"string\"[详细]

2023-03-22 12:33 分类：问答
how to check whether a var is string or number using javascript

I have a variable var number=\"1234\", though the number is a numeric value but it is between \"\" so when I check it using typeof or by NaN I got it as a st开发者_如何学Pythonring .[详细]

2023-03-22 05:10 分类：问答
run $.ajax() when end typed with format specified. how is it?

i want, when user typed, 0000/00/00(it is format date) after the end of typing run anything(example: AJAX CALL), how is it?[详细]

2023-03-21 04:03 分类：问答
JavaScript: detect if argument is array instead of object (Node.JS)

How should I detect if the argument is an array because typeof [] returns \'object\' and I want to distinguish between arrays and 开发者_开发百科objects.[详细]

2023-03-04 13:40 分类：问答
Generic type paramaters are not types?

I find the following a bit confusing.... Dictionary<Type, Object> _typeMap; public void开发者_StackOverflow社区 RegisterType<T>(Object o)[详细]

2023-03-03 07:10 分类：问答