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Update extramath.js

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Namhyeon Go 2022-11-07 01:36:54 +09:00 committed by GitHub
parent 25bedaf938
commit 58bf6b5ee9
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1 changed files with 13 additions and 1 deletions
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lib/extramath.js
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@ -43,6 +43,17 @@ function cos(A, B) {
return similarity; return similarity;
} }
// Cartesian product: https://en.wikipedia.org/wiki/Cartesian_product
function cartesianProduct(arr) {
return arr.reduce(function(a,b){
return a.map(function(x){
return b.map(function(y){
return x.concat([y]);
})
}).reduce(function(a,b){ return a.concat(b) },[])
}, [[]])
}
exports.DTM = DTM; exports.DTM = DTM;
exports.cos = cos; exports.cos = cos;
exports.measureSimilarity = function(s1, s2) { exports.measureSimilarity = function(s1, s2) {
@ -52,8 +63,9 @@ exports.measureSimilarity = function(s1, s2) {
var mat = dtm.toArray(); var mat = dtm.toArray();
return cos(mat[0], mat[1]); return cos(mat[0], mat[1]);
}; };
exports.cartesianProduct = cartesianProduct;
exports.VERSIONINFO = "ExtraMath module (extramath.js) version 0.0.3"; exports.VERSIONINFO = "ExtraMath module (extramath.js) version 0.0.4";
exports.AUTHOR = "catswords@protonmail.com"; exports.AUTHOR = "catswords@protonmail.com";
exports.global = global; exports.global = global;
exports.require = global.require; exports.require = global.require;