A way to combine multiple if statements all to one line with some clever spacing

Question

I want to find a way to combine multiple if statements all to one line with some clever spacing.

var myBool = myObject.prop1 ||
    myObject.prop2 && 
    myObject.prop3.someproperty

Since prop3 might be empty so I want to check if "someproperty" exist in prop3. But I do not want to add another if statement like typeof myObject.prop3.someproperty === 'undefined before my myBool.

Is there anyway that I can make everything in one line with clever spacing?

So do you mean `prop3` might be `undefined` or `prop3.someproperty` might be undefined. If the later, then your code as it is should be fine. `undefined` is falsy so that condition will evaluate as false anyway. — Matt Burland, Mar 14 '16 at 21:02
take in mind, that && comes before || so, so in your statement if prop1 is true the statement is true. — Jarlik Stepsto, Mar 14 '16 at 21:07
Related question: [How to use the ?: ternary operator in JavaScript](http://stackoverflow.com/questions/6259982/how-to-use-the-ternary-operator-in-javascript) — Yogi, Mar 14 '16 at 21:31

score 0 · Answer 1 · edited Mar 15 '16 at 00:51

0

var myBool = myObject.prop1 ||
    myObject.prop2 && 
    myObject.prop3.someproperty != null
    ? myObject.prop3.someproperty
    : false

edited Mar 15 '16 at 00:51

Alex

21,273
10
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answered Mar 14 '16 at 21:21

dodo

156
10

score 0 · Answer 2 · answered Mar 14 '16 at 21:27

var myBool = Boolean(myObject.prop1 ||
    myObject.prop2 && 
    myObject.prop3 && myObject.prop3.someproperty);

or

var myBool = !!(myObject.prop1 ||
    myObject.prop2 && 
    myObject.prop3 && myObject.prop3.someproperty);

since your naming implies that you expect myBool to contain a real boolean, not some truthy or falsy value

A way to combine multiple if statements all to one line with some clever spacing

2 Answers2