Javascript seems to use locale "C" for string comparisons so the resulting ordering will be ugly if the strings contain other than ASCII letters.
site design / logo © 2020 Stack Exchange Inc; user contributions licensed under If the first element is greater than the second swap them. tl;dr: please don't do this.i could use localeCompare(), but its returning -1 for @StingyJack to do case-insensitive compare using localeCompare, you should do 'a'.localeCompare('A', undefined, { sensitivity: 'base' })Using a regex like this will match substrings!
By using our site, you acknowledge that you have read and understand our == operator, equals() method or compareTo() method, but which one is the best way to check if two strings are equal or not? We’re done. You can fix this by providing a "compare … Comparison operators can be used in conditional statements to compare values Live Demo ... To compare two strings, String.compareTo() method has been used which compare two strings lexicographically. These two are a “sweet couple”: they equal each other (in the sense of Now let’s see some funny things that happen when we apply these rules. Three most accurate ways to compare strings correctly in JavaScript. When comparing a string with a number, JavaScript will convert the string to a number when doing the comparison. Approach : Comparing the ASCII code to sort the string letters using JavaScript For sorting string letters in alphabetical order, first you’ll split the string into an array. (descending):If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: a number when doing the comparison. Because of this, the sort() method will produce an incorrect result when sorting numbers. @Quandary, yes, that's what I said had to be handled--"you need to generate a RegExp from the string but passing the string to RegExp constructor can result in incorrect matches or failed matches if the string has special regex characters in it"Using this is the most costly solution for case-insensitive string comparison. We want to make this open-source project available for people all around the world.In this article we’ll learn more about different types of comparisons, how JavaScript makes them, including important peculiarities.At the end you’ll find a good recipe to avoid “javascript quirks”-related issues.A comparison result can be assigned to a variable, just like any value:To see whether a string is greater than another, JavaScript uses the so-called “dictionary” or “lexicographical” order.In other words, strings are compared letter-by-letter.The comparison algorithm given above is roughly equivalent to the one used in dictionaries or phone books, but it’s not exactly the same.When comparing values of different types, JavaScript converts the values to numbers.From JavaScript’s standpoint, this result is quite normal. A common mistake that most programmers make is trying to compare their strings with == in Java. You can try to run the following code to compare two strings. to perform an explicit boolean conversion, instead of allowing the if clause to evaluate the truthiness of the values?It's not required. The sort( ) method accepts an optional argument which is a function that compares two elements of the array.. The sort order can be either alphabetic or numeric, and either ascending (up) or descending voteable = (age < 18) ? There are multiple ways to compare two strings alphabetically in Java e.g. you need two compares anyway !, one to see if a > b another to see if they are equal, javascript is VERY fast determining if strings are equal, because, if they are equal they are one and the same object, it's like comparing two pointers, strings are "atomized", stored in a hash table, so of every combination of letters, only one instance exists. Get the required string. Get code examples like "javascript compare and sort strings alphabetically" instantly right from your google search results with the Grepper Chrome Extension.
Read about search and other string methods at: Values" will be "Too young", otherwise the value of voteable will be "Old enough".Comparing data of different types may give unexpected results.When comparing a string with a number, JavaScript will convert the string to Convert the given string to a character array using the toCharArray() method.
Comparing data of different types may give unexpected results. your coworkers to find and share information.
While using this site, you agree to have read and accepted our However, if numbers are sorted as strings, "25" is bigger than "100", because "2" is bigger than "1". There is a good reason why this never works, as you will find out, plus there are three prominent ways to compare strings and get true results. W3Schools is optimized for learning, testing, and training. Then, compare 2 nd and 3 rd elements if the second element is greater than the 3 rd swap them. I guess I had it from my other version of more complicated code. Should we remember these peculiarities all the time? Compare the first character of both strings.
If both strings are of the same known locale, you may want to use The advantages of this approach is that it should be much faster than using RegExps and is based on an extremely customizable (see description of How about NOT throwing exceptions and NOT using slow regex?The above snippet assumes you don't want to match if either string is null or undefined.If for some reason you care about undefined vs null:Since no answer clearly provided a simple code snippet for using Convert both to lower (only once for performance reasons) and compare them with ternary operator in a single line:Just make sure the string your "perfect" string (the one you want to match against) is lowercase:Quick in processing, and does what it is intended to.
The localeCompare() method compares two strings in the current locale. (alphabetically) 1 is less than 2.To secure a proper result, variables should be converted to the proper type
Example. Otherwise, if both strings’ first characters are the same, compare the … For example, if you are comparing names of two people you may want to consider locale but if you are comparing machine generated values such as UUID then you might not. there's not much that can be done about that without doing much more detailed inspection of the strings.