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| Notes from Ousterhout. |
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| <li>Interactive programs need command languages: |
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| <li>Typically redone for each application.</li> |
| <li>Result: weak, quirky.</li> |
| <li>emacs and csh powerful, but can't reuse.</li> |
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| <li>Solution: reusable scripting language. |
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| <li>Interpreter is a C library.</li> |
| <li>Provides basic features: variables, procedures, etc.</li> |
| <li>Applications extend with additional features.</li> |
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