SEARCH questions

`String.prototype.search` searches a string for a match against a regular expression and returns the index of the first match. If no match is found, it returns -1. 

const str = 'hello 123'; 
const index = str.search(/\d+/); 
console.log(index); // 6 

The MATCH function searches for a specified item in a range and returns its relative position. For example, =MATCH('Apple', A1:A10, 0) returns the position of 'Apple' in the range A1:A10. This function is often used in combination with INDEX for flexible data retrieval.

The LOOKUP function searches for a value in one row or column and returns a value from the same position in a second row or column. For example, =LOOKUP(10, A1:A10, B1:B10) looks for the number 10 in A1:A10 and returns the corresponding value from B1:B10. This function is useful for simple lookups and data retrieval.

The VLOOKUP function searches for a value in the first column of a table and returns a value from a specified column in the same row. For example, =VLOOKUP('Apple', A1:C10, 2, FALSE) searches for 'Apple' in column A and returns the corresponding value from column B. This function is useful for looking up information in tables.

PostgreSQL offers full-text search capabilities using `tsvector` and `tsquery` data types. To perform a full-text search, first create a `tsvector` column and populate it with data. For example: `ALTER TABLE my_table ADD COLUMN document_with_idx tsvector; UPDATE my_table SET document_with_idx = to_tsvector('english', document);`. Then, search using `SELECT * FROM my_table WHERE document_with_idx @@ to_tsquery('english', 'search_query');`.

SEO best practices for local businesses include optimizing your Google My Business profile with accurate information, including address, phone number, and business hours. Encourage and manage customer reviews, and ensure consistency in NAP (Name, Address, Phone Number) across all online directories. Use local keywords in your website content and meta tags, and build local citations to improve visibility in local search results. Additionally, creating localized content and obtaining backlinks from local sources can enhance your local SEO efforts.

While social media signals do not directly impact search engine rankings, social media can influence SEO indirectly by driving traffic to your website, increasing brand visibility, and fostering user engagement. Sharing high-quality content on social platforms can lead to more backlinks and greater online presence. Additionally, social media profiles can rank in search results, providing more opportunities to capture user interest and direct them to your site.

Google Search Console is a free tool provided by Google that helps webmasters monitor and maintain their site’s presence in search results. It provides insights into how Google crawls and indexes your site, reports on search traffic, and identifies issues like crawl errors or security problems. You can use it to submit sitemaps, analyze search queries, and track the performance of your pages, which helps in optimizing your site for better search engine visibility and resolving any technical issues.

DFS explores as far as possible along each branch before backtracking. Use a stack or recursion to keep track of nodes. For example, in a graph with nodes 1 -> 2 -> 3, DFS from 1 explores 1, 2, and then 3.

BFS explores all neighbors of a node before moving to the next level. Use a queue to keep track of nodes. For example, in a graph with nodes 1 -> 2 -> 3, BFS from 1 explores 1, then 2 and 3.

Binary search divides the search interval in half. Start with the middle element; if it matches the target, return it. Otherwise, adjust the search range to either the left or right half based on comparison. For example, searching for 4 in [1, 2, 3, 4, 5] returns index 3.