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When dealing with large amounts of data, it is important to be able to extract numbers from a string in an efficient and optimized way. This is especially true when dealing with strings that are written in reverse order. In this article, we will discuss how to extract numbers from a backwards string in JavaScript in an optimized way. We will look at various methods and techniques that can be used to achieve this goal. We will also discuss the pros and cons of each approach and provide examples of code that can be used to implement the solutions.<\/p>\n
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\/\/ Using a regular expression
\nconst extractNumber = str => str.match(\/\\d+\/g).map(Number).reverse();<\/p>\n
\/\/ Using a loop
\nconst extractNumber = str => {
\n let result = [];
\n for (let i = str.length – 1; i >= 0; i–) {
\n if (str[i] >= ‘0’ && str[i] <= '9') {\n result.push(Number(str[i]));\n }\n }\n return result;\n}; <\/p>\n
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