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  "readme": "# peek-stream\n\nTransform stream that lets you peek the first line before deciding how to parse it\n\n```\nnpm install peek-stream\n```\n\n[![build status](http://img.shields.io/travis/mafintosh/peek-stream.svg?style=flat)](http://travis-ci.org/mafintosh/peek-stream)\n![dat](http://img.shields.io/badge/Development%20sponsored%20by-dat-green.svg?style=flat)\n\n## Usage\n\n``` js\nvar peek = require('peek-stream')\nvar ldjson = require('ldjson-stream')\nvar csv = require('csv-parser')\n\nvar isCSV = function(data) {\n  return data.toString().indexOf(',') > -1\n}\n\nvar isJSON = function(data) {\n  try {\n    JSON.parse(data)\n    return true\n  } catch (err) {\n    return false\n  }\n}\n\n// call parser to create a new parser\nvar parser = function() {\n  return peek(function(data, swap) {\n    // maybe it is JSON?\n    if (isJSON(data)) return swap(null, ldjson())\n\n    // maybe it is CSV?\n    if (isCSV(data)) return swap(null, csv())\n\n    // we do not know - bail\n    swap(new Error('No parser available'))\n  })\n}\n```\n\nThe above parser will be able to parse both line delimited JSON and CSV\n\n``` js\nvar parse = parser()\n\nparse.write('{\"hello\":\"world\"}\\n{\"hello\":\"another\"}\\n')\nparse.on('data', function(data) {\n  console.log(data) // prints {hello:'world'} and {hello:'another'}\n})\n```\n\nOr\n\n``` js\nvar parse = parser()\n\nparse.write('test,header\\nvalue-1,value-2\\n')\nparse.on('data', function(data) {\n  console.log(data) // prints {test:'value-1', header:'value-2'}\n})\n```\n\nPer default `data` is the first line (or the first `65535` bytes if no newline is found).\nTo change the max buffer pass an options map to the constructor\n\n``` js\nvar parse = peek({\n  maxBuffer: 10000\n}, function(data, swap) {\n  ...\n})\n```\n\nIf you want to emit an error if no newline is found set `strict: true` as well.\n\n\n## License\n\nMIT",
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