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[[ -n $v ]] versus (( $#v > 0 ))

X-seq: zsh-users 12238
From: "Nikolai Weibull" <now@xxxxxxxx>
To: "ZSH Users" <zsh-users@xxxxxxxxxx>
Subject: [[ -n $v ]] versus (( $#v > 0 ))
Date: Tue, 20 Nov 2007 13:45:07 +0100
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What does the (imaginary) Zsh Scripting Style Guide say about

if [[ -n $v ]]; then
  ...
fi

versus

if (( $#v > 0 )); then
  ...
fi

?

Is it simply legacy that causes people to write [[ -n $v ]] over (( $#v > 0 ))?

Which version is "faster"?

Follow-Ups:
- Re: [[ -n $v ]] versus (( $#v > 0 ))
  - From: Dan Nelson
- Re: [[ -n $v ]] versus (( $#v > 0 ))
  - From: Peter Stephenson

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