Accessing different properties in a typescript union type
I might be a little bit late, but you could give this a try inside your function: if (‘itemName’ in item) { name = item.itemName; } else { name = item.itemTitle; }
if-statement
How to check if a value is equal or not equal to one of multiple values in Lua?
Your problem stems from a misunderstanding of the or operator that is common to people learning programming languages like this. Yes, your immediate problem can be solved by writing x ~= 0 and x ~= 1, but I’ll go into a little more detail about why your attempted solution doesn’t work. When you read x … Read more
Awk if else issues
You forgot braces around the if block, and a semicolon between the statements in the block. awk ‘{if($3 != 0) {a = ($3/$4); print $0, a;} else if($3==0) print $0, “-” }’ file > out
Multiple IF statements between number ranges
It’s a little tricky because of the nested IFs but here is my answer (confirmed in Google Spreadsheets): =IF(AND(A2>=0, A2<500), “Less than 500”, IF(AND(A2>=500, A2<1000), “Between 500 and 1000”, IF(AND(A2>=1000, A2<1500), “Between 1000 and 1500”, IF(AND(A2>=1500, A2<2000), “Between 1500 and 2000”, “Undefined”))))
What use does if_/3 have?
In old-fashioned Prolog code, the following pattern arises rather frequently: predicate([], …). predicate([L|Ls], …) :- condition(L), then(Ls, …). predicate([L|Ls], …) :- \+ condition(L), else(Ls, …). I am using lists here as an example where this occurs (see for example include/3, exclude/3 etc.), although the pattern of course also occurs elsewhere. The tragic is the following: … Read more
‘else’ is not recognized as an internal or external command, operable program or batch file
The else needs to be on the same “line” (a) as the if. Remove the new-line before the else like so: if “zz”==”TRUE” ( copy /a zz + /a ee=/a zz ) else ( copy /a e + /a %TMP%=/a e ) Please also note that “zz”==”TRUE” will never evaluate to true – I suspect … Read more
How can I port C++ code that uses the ternary operator to Rust?
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
How to use multiple arguments in an if statement with Liquid
Unfortunately, Liquid has a poor implementation of boolean algebra. Using Liquid’s operators and tags, here is a dirty way to achieve it: {% if include.featured == true and product.featured == true %} {% assign test = true %} {% endif %} {% if include.featured == false and product.featured == false %} {% assign test = … Read more
How to do a single line If statement in VBScript for Classic-ASP?
The conditional ternary operator doesn’t exist out of the box, but it’s pretty easy to create your own version in VBScript: Function IIf(bClause, sTrue, sFalse) If CBool(bClause) Then IIf = sTrue Else IIf = sFalse End If End Function You can then use this, as per your example: lunchLocation = IIf(dayOfTheWeek = “Tuesday”, “Fuddruckers”, “Food … Read more
When to use “if” and “when” in Clojure?
Use if when you have exactly one truthy and one falsy case and you don’t need an implicit do block. In contrast, when should be used when you only have to handle the truthy case and the implicit do. There is no difference in speed, it’s a matter of using the most idiomatic style. (if … Read more