# Using =' instead of '= for null oref checks

objectscriptQuality release
1.0.0
Id
OS0060
Rule type
Code Smell
Severity

## Blocker

Blocker
SQALE characteristic
• Reliability
• Instruction
Tags
probable-bug, trap
Remediation function
Constant/issue
Remediation cost
5min

Consider this code:

```    Class Fubar
{
ClassMethod m(someArg as Some.Class)
{
if (someArg =' "") {
w "my argument was a null oref", !
}
}
}
```

There is a trap in this code.

ObjectScript allows spaces between the unary negation operator (that is, `'`) and its argument: `'a` and `' a` are the same.

Which means that another way to write the code above would be:

```    Class Fubar
{
ClassMethod m(someArg as Some.Class)
{
if (someArg = '"") { //

which means the code turns out to be, ultimately:

Class Fubar
{
ClassMethod m(someArg as Some.Class)
{
if (someArg = 1) {
w "my argument was a null oref", !
}
}
}

And that is quite different from testing for a null object reference!

This is very probably a typo.```