On some existential level, every program is about turning one kind of data into another kind of data (isn't that the definition of a function?). I think a clearer way of expressing it would be to say that parsing is the process of assigning names to bits of input. In your example, you are assigning the name sample.message to the characters "Hello!". This is a necessary prerequisite to, but ...
I want to parse a JSON string in JavaScript. The response is something like var response = '{"result":true,"count":1}'; How can I get the values result and count from this?
JSON.parse() is used for parsing data that was received as JSON; it deserializes a JSON string into a JavaScript object. JSON.stringify() on the other hand is used to create a JSON string out of an object or array; it serializes a JavaScript object into a JSON string.
Parse throws an exception if it cannot parse the value, whereas TryParse returns a bool indicating whether it succeeded. TryParse does not just try / catch internally - the whole point of it is that it is implemented without exceptions so that it is fast. In fact the way it is most likely implemented is that internally the Parse method will call TryParse and then throw an exception if it ...
System.Convert.ToBoolean internally implements bool.Parse, so for this case they are the same. If the input string is null, then bool.Parse throws a System.ArgumentNullException while System.Convert.ToBoolean simply returns false.
double.Parse("3.5", System.Globalization.NumberStyles.AllowDecimalPoint) throws a FormatException. Now my computer's locale is set to German, wherein a comma is used as decimal separator. It might have to do something with that and double.Parse() expecting "3,5" as input, but I'm not sure. How can I parse a string containing a decimal number that may or may not be formatted as specified in my ...
