My 2 cents to correct the question and answers: The var is NOT a Java keyword. It’s a reserved type name. It seems not a big difference but in fact, it IS: var var = 0; Here var is a variable name too, so the var can be used as a type name, but there … Read more
Any use of var foo in a function will scope foo to that function. It doesn’t matter where in the function this takes place as var declarations are hoisted. Additional uses of var foo in the same function are syntactically legal but will have no effect as the variable is already scoped to that function. … Read more
It’s declared inside a closure, which means it can only be accessed there. If you want a variable accessible globally, you can remove the var: $(function(){ value = “10”; }); value; // “10” This is equivalent to writing window.value = “10”;.
Look into composite formatting: Console.WriteLine(“{0}.{1}.{2}”, mon, da, yer); You could also write (although it’s not really recommended): Console.WriteLine(mon + “.” + da + “.” + yer); And, with the release of C# 6.0, you have string interpolation expressions: Console.WriteLine($”{mon}.{da}.{yer}”); // note the $ prefix.
Because Objective-C simply extends C: In both C and Objective-C, a static variable is a variable that is allocated for the entire lifetime of a program. This is in contrast to automatic variables, whose lifetime exists during a single function call; and dynamically-allocated variables like objects, which can be released from memory when no longer … Read more
The var keyword is never “needed”. However if you don’t use it then the variable that you are declaring will be exposed in the global scope (i.e. as a property on the window object). Usually this is not what you want. Usually you only want your variable to be visible in the current scope, and … Read more
Object: Each object in C# is derived from object type, either directly or indirectly. It is compile time variable and require boxing and unboxing for conversion and it makes it slow. You can change value type to reference type and vice versa. public void CheckObject() { object test = 10; test = test + 10; … Read more
An approach that might work is to write these two methods: public static void WithInt() { int x = 5; Console.WriteLine(x); } public static void WithVar() { var x = 5; Console.WriteLine(x); } Compile, and use ildasm to examine the produced CIL. Show your boss. edit @ck has done all but the last step for … Read more
In C# var keyword works only locally inside function: var i = 10; // implicitly typed In C++ auto keyword can deduce type not only in variables, but also in functions and templates: auto i = 10; auto foo() { //deduced to be int return 5; } template<typename T, typename U> auto add(T t, U … Read more