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Tip: load source from a file in the Node.js shell

Node.js is really handy as an interactive shell for JavaScript. To load source code from a file, you must create a module. This post explains how.

File test.js: = function() {
        console.log("Hello world!");
    > var t = require("./test");
    Hello world!
Node caches modules. Thus, if the source file changes, you need to clear the module cache and re-require the module:
    > require.cache = {};
    > t = require("./test");
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