How to find the middle character of a string in javascript
Show // >>> is an unsigned right shift bitwise operator. It's equivalent to division by 2, with truncation, as long as the length of the string does not exceed the size of an integer in Javascript. // About the ~ operator, let's rather start with the expression n & 1. This will tell you whether an integer n is odd (it's similar to a logical and, but comparing all of the bits of two numbers). The expression returns 1 if an integer is odd. It returns 0 if an integer is even. // If n & 1 is even, the expression returns 0. // If n & 1 is odd, the expression returns 1. // ~n & 1 inverts those two results, providing 0 if the length of the string is odd, and 1 if the length of the sting is even. The ~ operator inverts all of the bits in an integer, so 0 would become -1, 1 would become -2, and so on (the leading bit is always the sign). // Then you add one, and you get 0+1 (1) characters if the length of the string is odd, or 1+1 (2) characters if the length of the string is even. @author by jacobb the link of the source is: https://codepen.io/jacobwarduk/pen/yJpAmK
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DescriptionJavascript String Get word middle character P:Return the middle character of the word. If the word's length is odd, return the middle character. If the word's length is even, return the middle 2 characters. Examples: getMiddle("test") should return "es" getMiddle("testing") should return "t" getMiddle("middle") should return "dd" getMiddle("A") should return "A" function getMiddle(s) { const i = Math.floor(s.length / 2); let result = s[i]; if(s.length % 2 === 0 && i > 0) { result = s[i-1] + result;//from w w w . j a v a 2s.com } return result; } const action = getMiddle("c"); console.log(action); PreviousNext Related
How do you find the middle character in a string?Approach:. Get the string whose middle character is to be found.. Calculate the length of the given string.. Finding the middle index of the string.. Now, print the middle character of the string at index middle using function charAt() in Java.. How do you substring a string in Javascript?The substring() method extracts characters, between two indices (positions), from a string, and returns the substring. The substring() method extracts characters from start to end (exclusive). The substring() method does not change the original string.
Does string contain substring Javascript?Use the String. includes() method to check if a string contains a substring, e.g. myString. includes('substring') .
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