Movatterモバイル変換

[0]ホーム
URL:

Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly

 Sign up
Appearance settings

added js solution to _3#188

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to ourterms of service andprivacy statement. We’ll occasionally send you account related emails.

Already on GitHub?Sign in to your account

Merged
Show file tree
Hide file tree
Changes fromall commits
Commits
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 2 additions & 1 deletion.gitignore
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -7,4 +7,5 @@ out/
*.vscode/
src/main/java/com/fishercoder/solutions/_99999RandomQuestions.java
src/main/java/com/fishercoder/solutions/_Contest.java
.project
.project
bin
43 changes: 43 additions & 0 deletionsjavascript/_17.js
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,43 @@
function letterCombinations(digits) {
// If the input is an empty string, return an empty array.
if (digits.length === 0) {
return [];
}

// Mapping of digits to letters as per the telephone keypad using a javascript dictionary.
const digitToChar = {
'2': ['a', 'b', 'c'],
'3': ['d', 'e', 'f'],
'4': ['g', 'h', 'i'],
'5': ['j', 'k', 'l'],
'6': ['m', 'n', 'o'],
'7': ['p', 'q', 'r', 's'],
'8': ['t', 'u', 'v'],
'9': ['w', 'x', 'y', 'z']
};

// Resultant array to store all possible combinations
const result = [];

// Backtracking function to generate combinations
function backtrack(index, currentCombination) {
// if the current combination has the same length as the input digits.
if (index === digits.length) {
result.push(currentCombination);
return;
}

// Get the letters that the current digit maps to.
let letters = digitToChar[digits[index]];

// Loop through the letters and call backtrack recursively for the next digit.
for (let letter of letters) {
backtrack(index + 1, currentCombination + letter);
}
}

// Start backtracking from the first digit (index 0) with an empty string as the initial combination.
backtrack(0, '');

return result;
};
23 changes: 23 additions & 0 deletionsjavascript/_3.js
View file
Open in desktop
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,23 @@
function lengthOfLongestSubstring(s) {
// Using the "sliding window" data structure.
// Create a javascript set to store unique characters.
let charSet = new Set();
let left = 0; // Left pointer of the sliding window.
let maxLength = 0;

// This moves the right pointer of the sliding window.
for (let right = 0; right < s.length; right++) {
// If the character at the right pointer is already in the set, move the left pointer.
while (charSet.has(s[right])) {
charSet.delete(s[left]);
left++;
}
// Add the current character at the right pointer to the set.
charSet.add(s[right]);

// Update the maximum length of substring without repeating characters.
maxLength = Math.max(maxLength, right - left + 1);
}

return maxLength;
}
4 changes: 2 additions & 2 deletionspaginated_contents/algorithms/1st_thousand/README.md
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -796,7 +796,7 @@
| 20 | [Valid Parentheses](https://leetcode.com/problems/valid-parentheses/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_20.java) | [:tv:](https://www.youtube.com/watch?v=eBbg5pnq5Zg) | Easy | Stack
| 19 | [Remove Nth Node From End of List](https://leetcode.com/problems/remove-nth-node-from-end-of-list/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_19.java) | [:tv:](https://youtu.be/Kka8VgyFZfc) | Medium | Linked List
| 18 | [4 Sum](https://leetcode.com/problems/4sum/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_18.java) || Medium | Two Pointers
| 17 | [Letter Combinations of a Phone Number](https://leetcode.com/problems/letter-combinations-of-a-phone-number/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_17.java) || Medium | Backtracking
| 17 | [Letter Combinations of a Phone Number](https://leetcode.com/problems/letter-combinations-of-a-phone-number/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_17.java), [Javascript](https://github.com/fishercoder1534/Leetcode/blob/master/javascript/_17.js) || Medium | Backtracking
| 16 | [3Sum Closest](https://leetcode.com/problems/3sum-closest/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_16.java) || Medium | Two Pointers
| 15 | [3Sum](https://leetcode.com/problems/3sum/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_15.java), [C++](../master/cpp/_15.cpp) | [:tv:](https://www.youtube.com/watch?v=jeim_j8VdiM) | Medium | Two Pointers, Binary Search
| 14 | [Longest Common Prefix](https://leetcode.com/problems/longest-common-prefix/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_14.java) | [:tv:](https://www.youtube.com/watch?v=K1ps6d7YCy4) | Easy
Expand All@@ -810,6 +810,6 @@
| 6 | [ZigZag Conversion](https://leetcode.com/problems/zigzag-conversion/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_6.java) | | Easy |
| 5 | [Longest Palindromic Substring](https://leetcode.com/problems/longest-palindromic-substring/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_5.java) | | Medium |
| 4 | [Median of Two Sorted Arrays](https://leetcode.com/problems/median-of-two-sorted-arrays/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_4.java), [C++](../master/cpp/_4.cpp) | | Hard | Divide and Conquer
| 3 | [Longest Substring Without Repeating Characters](https://leetcode.com/problems/longest-substring-without-repeating-characters/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_3.java), [C++](../master/cpp/_3.cpp) | | Medium | HashMap, Sliding Window
| 3 | [Longest Substring Without Repeating Characters](https://leetcode.com/problems/longest-substring-without-repeating-characters/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_3.java), [C++](../master/cpp/_3.cpp), [Javascript](https://github.com/fishercoder1534/Leetcode/blob/master/javascript/_3.js) | | Medium | HashMap, Sliding Window
| 2 | [Add Two Numbers](https://leetcode.com/problems/add-two-numbers/) | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_2.java) | | Medium | LinkedList
| 1 | [Two Sum](https://leetcode.com/problems/two-sum/) | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/firstthousand/_1.java), [C++](../master/cpp/_1.cpp), [Javascript](../master/javascript/_1.js) | [:tv:](https://www.youtube.com/watch?v=kPXOr6pW8KM&t=) | Easy | HashMap
[8]ページ先頭
©2009-2025 Movatter.jp