Shorthand for if-else statement

Question

I have some code with a lot of if else statements similar to this   var name    true    if  name     true         var hasName    Y     else if  name     false         var hasName    N        But is there a way to make these statements shorter  Something like    true     false

User · Answer

You can use an object as a map     var hasName               true      Y            false     N       name     This also scales nicely for many options    var hasName               true              Y            false             N            fileNotFound      O       name      Bonus point for people getting the reference   Note  you should use actual booleans instead of the string value  true  for your variables indicating truth values

User · Answer

Operator If you want to shorten If Else you can use    operator as  condition   action-on-true   action-on-false else   For instance  let gender   isMale    Male     Female    In this case else part is mandatory   amp  amp  Operator In another case  if you have only if condition you can use  amp  amp  operator as  condition  amp  amp  action   For instance   this settings  amp  amp   this settings   new TableSettings      FYI  You have to try to avoid using if-else or at least decrease using it and try to replace it with Polymorphism or Inheritance  Go for being Anti-If guy

User · Answer

Using the ternary    operator  spec    var hasName    name      true      Y    N     The ternary operator lets us write shorthand if  else statements exactly like you want    It looks like    name      true    - our condition     - the ternary operator itself   Y  - the result if the condition evaluates to true   N  - the result if the condition evaluates to false  So in short  question   result if true   result is false    as you can see - it returns the value of the expression so we can simply assign it to a variable just like in the example above

User · Answer

Try this method   Shorthand method    x000D   x000D  let variable1       x000D   x000D  let variable2   variable1     new  x000D  console log variable2      new x000D   x000D   x000D    Longhand method    x000D   x000D   let variable1    ya   x000D   let varibale2  x000D   x000D   if  variable1     null    variable1     undefined    variable1         x000D         variable2   variable1  x000D   x000D  console log variable2      ya x000D   x000D   x000D

User · Answer

Try this   hasName   name    Y     N

User · Answer

Try like  var hasName    N   if  name     true         hasName    Y       Or even try with ternary operator like  var hasName    name     true      Y     N      Even simply you can try like  var hasName    name     Y     N      Since name has either Yes or No but iam not sure with it

User · Answer

Most answers here will work fine if you have just two conditions in your if-else  For more which is I guess what you want  you ll be using arrays  Every names corresponding element in names array you ll have an element in the hasNames array with the exact same index  Then it s a matter of these four lines   names    true   var names     true   false   1   2    var hasNames     Y   N   true   false    var intIndex   names indexOf name   hasName   hasNames intIndex      This method could also be implemented using Objects and properties as illustrated by Benjamin

[javascript] Shorthand for if-else statement

Examples related to javascript

Examples related to if-statement