Data update

Task/Boyer-Moore-string-search/JavaScript/boyer-moore-string-search.js

@@ -0,0 +1,52 @@
+function display(numbers) {
+  console.log(`[${numbers.join(", ")}]`);
+}
+
+function string_search_single(haystack, needle) {
+  const index = haystack.indexOf(needle);
+  return index;
+}
+
+function string_search(haystack, needle) {
+  const result = [];
+  let start = 0;
+  let index = 0;
+
+  while (index >= 0 && start < haystack.length) {
+    const haystackReduced = haystack.substring(start);
+    index = string_search_single(haystackReduced, needle);
+    if (index >= 0) {
+      result.push(start + index);
+      start += index + needle.length;
+    }
+  }
+  return result;
+}
+
+function main() {
+  const texts = [
+    "GCTAGCTCTACGAGTCTA",
+    "GGCTATAATGCGTA",
+    "there would have been a time for such a word",
+    "needle need noodle needle",
+    "DKnuthusesandprogramsanimaginarycomputertheMIXanditsassociatedmachinecodeandassemblylanguages",
+    "Nearby farms grew an acre of alfalfa on the dairy's behalf, with bales of that alfalfa exchanged for milk.",
+  ];
+
+  const patterns = ["TCTA", "TAATAAA", "word", "needle", "and", "alfalfa"];
+
+  for (let i = 0; i < texts.length; ++i) {
+    console.log(`text${i + 1} = ${texts[i]}`);
+  }
+  console.log();
+
+  for (let i = 0; i < texts.length; ++i) {
+    const indexes = string_search(texts[i], patterns[i]);
+    console.log(
+      `Found "${patterns[i]}" in 'text${i + 1}' at indexes `
+    );
+    display(string_search(texts[i], patterns[i]));
+  }
+}
+
+main();