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| def instacheck(name) | |
| unless /[a-z0-9._]{,30}/.match(name) | |
| return false | |
| end | |
| if /\.\./.match(name) | |
| return false | |
| end | |
| if /^\d+$/.match(name) | |
| return false | |
| end | |
| if /^\./.match(name) | |
| return false | |
| end | |
| true | |
| end |
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