(Might be more appropriate to have an if (arr.length=0) to take some other action rather than running the SELECT statement. (And please tell me you're not using client-side JavaScript to form your SQL.)ĮDIT: to allow for an empty array, include a default value for the resulting string, otherwise (as pointed out by missingno) the string would be "''": var newString = arr.length = 0 ? "" : "'" + arr.join("','") + "'" When you need to join together every item in a JavaScript array to form a comma-separated list of values, use. Due to the way the script works the array has to be turned into a string at least once. So if you specify a separator that includes the quotation marks and commas you just have to manually append a starting and ending quote for the first and last item (respectively). Array to string containing comma's - JavaScript Ask Question Asked 9 years, 5 months ago Modified 8 years, 11 months ago Viewed 7k times 6 Ok so I'm writing a script that includes whole sentences, but whole sentences can contain comma's. The Array.join() method returns a string that is all of the array elements concatenated into a single string with an (optional) separator between each item. toString (): If you are looking for the simplest way it's better to use toString () like this: var arr 'Zero', 'One', 'Two' console.log (arr. As a developer using JavaScript, you will certainly need to turn strings into an array. I want to return a string formatted as a list of names separated by commas except for the last two names, which should be separated by an ampersand. quotedAndCommaSeparated = "'item1','item2','item3','item4'" Convert a JavaScript Array into String with or without commas. Var quotedAndCommaSeparated = "'" + arr.join("','") + "'" We can have an optional separator parameter, which specifies the character to use between each element, and by default, the separator is a comma. It is one of the simplest ways to do that. If you intend to use the elements of your array as integers and not as strings after splitting the string, consider converting them into such. Instead, one way to do it is as follows: var arr = Using the join () method In this method, we have converted an array to a comma-separated string using the join () method. Tip: If an empty string ('') is used as the separator, the string is split between each character. The quotes aren't preserved because they're not actually part of the string value, they're just necessary to indicate string literals in your code. Definition and Usage The split() method is used to split a string into an array of substrings, and returns the new array.
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