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ccppjavaccppjava
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add pagejs related module, also update lesson 3
( ;) always one - two lessons behind, sorry )
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‎nathansununiversity_03.js‎

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// http://nathansuniversity.com/pegs.html
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// http://pegjs.majda.cz/
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// page 1
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start =
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char
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char =
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[A-Z]
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// page 2
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start =
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countrycode
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lowercase =
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[a-z]
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countrycode =
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first:lowercase second:lowercase
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{ return "" + first + second ;}
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// page 3
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start =
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word
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word =
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allLower
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/ allUpper
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allLower =
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all:[a-z]+
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{ return all.join("");}
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allUpper =
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all:[A-Z]+
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{ return all.join("");}
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// page 3
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start =
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wordlist
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wordlist =
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nword:word sword:spaceword*
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{ if (sword && sword.length) {
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sword.unshift(nword)
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return sword;
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} else {
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return [nword];
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}
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}
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word =
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nword:[a-z]+
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{ return nword.join(""); }
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space =
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" "
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spaceword =
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space nword:word
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{ return nword; }
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/* test code for page 3 */
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var parse = wrapExceptions(PEG.buildParser(answer).parse);
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assert_eq(parse(""), undefined,
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"don't parse empty string");
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assert_eq(parse("dog"), ["dog"],
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"parse dog");
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assert_eq(parse("black dog"), ["black", "dog"],
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"parse black dog");
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assert_eq(parse("angry black dog"), ["angry", "black", "dog"],
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"parse angry black dog");
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assert_eq(parse("Gray dog"), undefined,
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"don't parse Gray dog");
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// page 4

‎node_modules/.bin/pegjs‎

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‎node_modules/pegjs/CHANGELOG‎

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‎node_modules/pegjs/LICENSE‎

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