javascript - Implicit cast/number check produces 'unexpected X' JSLint error -

this nothing serious, question out of curiosity. following script in jslint.com gives strange , 'unexpected' error. script works, still know if can explain error.

var hashvar = parseint(location.hash.replace('#',''), 10); if(hashvar-0 === hashvar){l();} 

error: problem @ line 3 character 4: unexpected 'hashvar'.

enjoy weekend, ulrik

you want this:

var hashvar = parseint(location.hash.replace('#', ''), 10); if ( !isnan(hashvar) ) { l(); }  

this code has same functionality original code.

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btw, this:

if ( !isnan(hashvar) ) { l(); }

can further reduced this:

isnan(hashvar) || l();

;-)

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explanation:

the return value of parseint can be:

a) integer numeric value
b) nan value

therefore, if want test whether return value integer or not, use isnan().