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        Wed, 30 Mar 2016 11:51:24 -0700 (PDT)
From: Bart Schaefer <schaefer@brasslantern.com>
Message-Id: <160330115211.ZM1537@torch.brasslantern.com>
Date: Wed, 30 Mar 2016 11:52:11 -0700
In-Reply-To: <87twjnn8bn.fsf@debian.uxu>
Comments: In reply to Emanuel Berg <embe8573@student.uu.se>
        "default values" (Mar 30,  8:12pm)
References: <87twjnn8bn.fsf@debian.uxu>
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To: zsh-users@zsh.org
Subject: Re: default values
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On Mar 30,  8:12pm, Emanuel Berg wrote:
}
} Is there a C-like "... ? ... : ... ;" syntax or
} otherwise standard or conventional way to assign
} default values to sometimes-not-submitted parameters?

In math context you can actually use ternary syntax:

    $(( x ? y : z ))

But I think you're actually looking for this:

${NAME-WORD}
${NAME:-WORD}
     If NAME is set, or in the second form is non-null, then substitute
     its value; otherwise substitute WORD.  In the second form NAME may
     be omitted, in which case WORD is always substituted.

So e.g.

    local num_files=${1:-10}
    local where=${2:-./}