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This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 1,000,000+ packages pre-installed, including negative1 with all npm packages installed. Try it out:

require("scarlet/package.json"); // scarlet is a peer dependency. var negative1 = require("negative1")

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negative1 v0.1.3

Ensure the last parameter to your method is a callback

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