$list = Get-Content "D:\NinjaRIft\weapon\weapon.txt" |
        Where-Object { $_.Trim() -ne "" } |
        Sort-Object |
        ForEach-Object { "$($_):1" }


$result = '{"char_weapons":"' + ($list -join ",") + '"}'
$result | Set-Content "D:\NinjaRIft\char_weapons.txt"