Make a backup file: Difference between revisions
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AMSDOS has automatic one-level backups which also work from Locomotive BASIC: If e.g. the file <tt>test.bas</tt> is saved, the data gets written to <tt>test.$$$</tt>. When the file is closed a preexisting <tt>test.bas</tt> gets renamed to <tt>test.bak</tt> and finally <tt>test.$$$</tt> is renamed to <tt>test.bas</tt>. (These backups affect all file types, not just BASIC source code.) |
AMSDOS has automatic one-level backups which also work from Locomotive BASIC: If e.g. the file <tt>test.bas</tt> is saved, the data gets written to <tt>test.$$$</tt>. When the file is closed a preexisting <tt>test.bas</tt> gets renamed to <tt>test.bak</tt> and finally <tt>test.$$$</tt> is renamed to <tt>test.bas</tt>. (These backups affect all file types, not just BASIC source code.) |
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=={{header|PicoLisp}}== |
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PicoLisp makes use of external commands as much as possible (at least for not time-critical operations), to avoid duplicated functionality. |
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<lang PicoLisp>(let Path (in '(realpath "foo") (line T)) |
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(call 'mv Path (pack Path ".backup")) |
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(out Path |
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(prinl "This is the new file") ) )</lang> |
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=={{header|Pike}}== |
=={{header|Pike}}== |
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