Use the JavaScript String slice() method to extract a substring from a string.Then, use the slice() method to extract the local part of the email starting from the beginning of string up to the character before the sign.So, a n in the pattern is used when we need newline characters in the result, while anchors are used to find something at the beginning/end of a line. The returned value of the indexOf() is used as the second argument of the slice() method. Unlike the anchors, that only test the condition (start/end of a line), n is a character, so it becomes a part of the result. First, use the indexOf() method to locate the sign.Output: john Code language: JavaScript ( javascript ) That is why it is safer to use \z as the very end of string anchor in a Java regex. The following example uses the slice() method to get the local part of an email address: let email = ' ' let localPart = email.slice( 0,email.indexOf( Code language: JavaScript ( javascript ) When matching a character at the end of string, mind that the anchor matches either the very end of string or the position before the final line break char if it is present even when the Pattern.MULTILINE option is not used. Output: Code language: CSS ( css ) JavaScript String slice() method practical example The start parameter is a zero-based index at which the method starts the extraction. The slice() method has two optional parameters start and end. The following shows the syntax of the slice() method: slice(start, end) The () method extracts a portion of a string and returns it as a substring. Introduction to the JavaScript String slice() method Summary: in this tutorial, you will learn how to use the JavaScript String slice() method to extract a substring from a string.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |