Both question mark (?) and exclamation mark (!) has a special meaning when we are writing code. When using the exclamation mark (!) in code it is the same as saying not in English. Okay, that is good to know, right? But why? A exclamation mark (!) negates an expression....
ExpressionStringMatched? ma+n mn No match (no a character) man 1 match mann 1 match main No match (a is not followed by n) woman 1 match ? - Question Mark The question mark symbol ? matches zero or one occurrence of the pattern left to it. ExpressionStringMatched? ma?n mn 1 match...
Missing punctuation. As mentioned earlier, JavaScript programming often involves lots of symbol pairs like opening and closing parentheses and brackets. For example, if you typealert(‘hellO’;—leaving off the closing parenthesis—you’ll probably get the:“Unexpected token;” message, meaning that ...
Part I. Meaning of... General 0 11591 Problem With Comparison Operator <=> in G++ by: Oralloy | last post by: Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is ...
The first thing you need to remember when programming is that JavaScript is case-sensitive, meaning that there is a big difference between lower and upper case letters. So far you’ve learned how to call the alert method, which displays the small windows with a message. None of the ...
The example in this section demonstrates importing methods which have a JS Date object as its return or parameter. Dates are marshalled across interop by-value, meaning they are copied in much the same way as JS primitives.A Date object is timezone agnostic. A .NET DateTime is adjusted ...
If a function is invoked as a free function invocation, meaning it was invoked without any of the conditions present above, this is the global object. In a browser, it is the window object. If in strict mode ('use strict'), this will be undefined instead of the global object. If mult...
What is?and Optional Properties? At the end of some non-required property names of the interface, add?This is an optional property, which is actually a literal meaning, a conditional property. Optional Property is just the property name, that is, the question mark after options inoptions?: ...
Interesting that if you paste é (e-acute) into UTF8 Encode it gives you é, but if you try to UTF8 decode this you get � (question mark in a diamond). Why? If you put é in the INPUT box and use UTF8 Decode it returns to é (e-acute). With é in the INPUT...
Note that both o and p are identifiers in this expression, and therefore must obey rules governing identifier names (for e.g. there can't be a question mark in the name). It's pretty clear from the expression above as to why do we term this notation as 'dot notation'— it's becaus...