Is there a comparable feature in C# to JavaScript's assignment syntax var x = y || z;? This operation does not result in true/false. If y is defined, it assigns that value to x, otherwise it assigns z to x, even if it is undefined.
Keep in mind, in JavaScript the variable still needs to be declared: var test;
It seems like you may be searching for the ?? operator.
let xyz = foo !== undefined ? foo : "default";
sure thing!
Your search ends here
let result = foo ?? bar;
Within the realm of C#, the concept of an undefined variable is non-existent. This type of operator holds no significance in the language.
In contrast to JavaScript, C# is a statically typed language, which means that attempting operations like the one described will result in a compilation error.
Consider writing an if statement like this:
if(pizzaPrice == hamburgerPrice)
If you try to compile this code without first declaring the variables:
decimal pizzaPrice;
decimal hamburgerPrice;
You will encounter a compile-time error.
Update: Even if the variables were declared, C# does not support this functionality.
On the other hand, JavaScript evaluates variables in if conditions using the ToBoolean method. If the variable is undefined or null, it is considered equal to
false</code. C# does not exhibit this behavior.</p>
<p>Check out this informative article: <a href="http://www.mapbender.org/JavaScript_pitfalls%3a_null,_false,_undefined,_NaN" rel="nofollow">JavaScript pitfalls: null, false, undefined, NaN</a></p>
<p>However, if you want to check if a variable is referencing <code>nullFor example:
var x = y ?? z;
A solution exists: ??
string x = y ?? z;
This essentially equates to:
string x = y != null ? y : z
However, there are distinctions between Javascript and C#. In JS, both y and z must be declared in advance. On the contrary, in C#, y and z also need to be "assigned," or else a compiler error will occur.
The operator necessitates a nullable type and validates if the first element is null before returning the second option. Multiple chains can be added (a ?? b ?? c ?? d ?? e) if desired.
Please note that an empty string does not equal null.
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