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What's the best way to validate results from a select field in `search.lookupFields`? I need a way to only take action on soFields['shipmethod][0].value if soFields['shipmethod'][0] exists

```var shipmethod = soFields['shipmethod'][0] &amp;&amp; soFields['shipmethod'][0].value ```

What does that `&amp;&amp;` syntax do in this context?

that syntax is similar to ternary or an if statement

it's basically saying
```if(soFields['shipmethod'][0] &amp;&amp; soFields['shipmethod'][0].value){
   var shipmethod = soFields['shipmethod'][0].value
}```

ok so it's similar for `||` as an assignment syntax

It never ceases to amaze me that even after a couple decades of JavaScript, there's always more to learn

I improved it slightly because I need to do calculations on it later so it has to have a default value

```      soShipMethod = soFields['shipmethod'][0] &amp;&amp; soFields['shipmethod'][0].value || null;
      soShipMethodText = soFields['shipmethod'][0] &amp;&amp; soFields['shipmethod'][0].text || ' ';```

has optional chaining been released with 2.1?

it's released with TypeScript for some time now