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Translate all code to English (#1836)
* Review the EN heading format. * Fix pythontutor headings. * Fix pythontutor headings. * bug fixes * Fix headings in **/summary.md * Revisit the CN-to-EN translation for Python code using Claude-4.5 * Revisit the CN-to-EN translation for Java code using Claude-4.5 * Revisit the CN-to-EN translation for Cpp code using Claude-4.5. * Fix the dictionary. * Fix cpp code translation for the multipart strings. * Translate Go code to English. * Update workflows to test EN code. * Add EN translation for C. * Add EN translation for CSharp. * Add EN translation for Swift. * Trigger the CI check. * Revert. * Update en/hash_map.md * Add the EN version of Dart code. * Add the EN version of Kotlin code. * Add missing code files. * Add the EN version of JavaScript code. * Add the EN version of TypeScript code. * Fix the workflows. * Add the EN version of Ruby code. * Add the EN version of Rust code. * Update the CI check for the English version code. * Update Python CI check. * Fix cmakelists for en/C code. * Fix Ruby comments
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en/codes/javascript/chapter_searching/binary_search_edge.js
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45
en/codes/javascript/chapter_searching/binary_search_edge.js
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/**
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* File: binary_search_edge.js
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* Created Time: 2023-08-22
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* Author: Gaofer Chou (gaofer-chou@qq.com)
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*/
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const { binarySearchInsertion } = require('./binary_search_insertion.js');
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/* Binary search for the leftmost target */
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function binarySearchLeftEdge(nums, target) {
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// Equivalent to finding the insertion point of target
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const i = binarySearchInsertion(nums, target);
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// Target not found, return -1
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if (i === nums.length || nums[i] !== target) {
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return -1;
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}
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// Found target, return index i
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return i;
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}
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/* Binary search for the rightmost target */
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function binarySearchRightEdge(nums, target) {
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// Convert to finding the leftmost target + 1
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const i = binarySearchInsertion(nums, target + 1);
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// j points to the rightmost target, i points to the first element greater than target
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const j = i - 1;
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// Target not found, return -1
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if (j === -1 || nums[j] !== target) {
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return -1;
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}
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// Found target, return index j
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return j;
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}
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/* Driver Code */
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// Array with duplicate elements
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const nums = [1, 3, 6, 6, 6, 6, 6, 10, 12, 15];
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console.log('\nArray nums = ' + nums);
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// Binary search left and right boundaries
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for (const target of [6, 7]) {
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let index = binarySearchLeftEdge(nums, target);
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console.log('Leftmost element ' + target + ' has index ' + index);
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index = binarySearchRightEdge(nums, target);
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console.log('Rightmost element ' + target + ' has index ' + index);
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}
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