Rust does not have the ternary operator because it’s not needed. Almost everything evaluates to some value, and if / else expressions are no exception: let r = 42.42; let sgn_r = if r >= 0. { 1. } else { -1. }; You’ll note that I’ve also changed your variable names to be idiomatic … Read more
If your requirement was simply empty or null (like mine when I saw this title in a search result), you can use Dart’s safe navigation operator to make it a bit more terse: if (routeinfo[“no_route”]?.isEmpty ?? true) { // } Where isEmpty checks for an empty String, but if routeinfo is null you can’t call … Read more
In the general case, you use 2 branches that go to past the if() body. If either one is taken, the if body doesn’t run. In assembly, you usually want to use the negation of the C condition, because you’re jumping past the loop body so it doesn’t run. Your later version does it backwards … Read more
; is not allowed before else in the majority of cases. if ((input=”y”) or (input=”Y”)) then begin writeln (‘blah blah’); end else if ((input=”n”) or (input=”N”)) then begin writeln (‘blah’); end else begin writeln (‘Input invalid!’); end; will compile. But… Prefer using begin … end brackets to avoid misunderstanding of code in complicated if then … Read more
If you cannot come up with a formula, you can use a table for such a limited number of outcomes: final int[][] result = new int[][] { { 0, 0, 1, 2 }, { 0, 0, 2, 1 }, { 2, 1, 3, 3 }, { 1, 2, 3, 3 } }; return result[one][two];
In most cases, returning early reduces the complexity and makes the code more readable. It’s also one of the techniques applied in Spartan programming: Minimal use of Control Minimizing the use of conditionals by using specialized constructs such ternarization, inheritance, and classes such as Class Defaults, Class Once and Class Separator Simplifying conditionals with early … Read more
The reason for this result can be found in documentation of function strtol which is used first on using the comparison operators EQU, NEQ, LSS, LEQ, GTR, GEQ as explained in my answer on Symbol equivalent to NEQ, LSS, GTR, etc. in Windows batch files. Return Value On success, the function returns the converted integral … Read more
IIf is not an operator or a language construct, it’s a function, just like any other function such as Left. It will therefore evaluate all its arguments at all times, whereas with If you will only evaluate the correct branch. Example: denominator = 0 value = IIf(denominator = 0, 0, value / denominator) This will … Read more
If both sides of an IF comparison are composed strictly of decimal digits, then IF will interpret both sides as numbers. This is what enables IF to correctly determine that 10 is greater than 9. If you have any non digit characters, then IF does a string comparison. For example, “10” is less than “9” … Read more
Essentially the line is saying, “if you can let the new variable name equal the non-optional version of optionalName, do the following with it”. As Martin pointed out, this is called Optional Binding. The sole purpose of it is to test if an optional variable contains an actual value and bind the non-optional form to … Read more