JavaScript offers many ways to check if a string contains a substring. Learn the canonical way, and also find out all the options you have, using plain JavaScriptTHE AHA STACK MASTERCLASS Launching May 27th Checking if a string contains a substring is one of the most common tasks in any ...
There are multiple ways to check if a string contains a substring in JavaScript. You can use either String.includes(), String.indexOf(), String.search(), String.match(), regular expressions, or 3rd-party library like Lodash. String.includes() Method The String.includes()provides the most ...
TheString.indexOf()method works in all modern browsers, and back to at least IE6. A“gotcha” with both of these# Neither theString.includes()method norString.indexOf()method check if the substring is a complete/standalone word.
Use thewhileLoop With thesubstring()Function to Left Trim Strings in JavaScript To remove white spaces from the start of the text, we can use thewhileloop with thesubstring()function. We will keep track of the number of white spaces by using a variable calledindex, and we will give it ...
Another method to check whether a string occurs in a table involves using the SELECT statement with the INSTR() function. This function is similar to LOCATE() and is employed to determine the position of the first occurrence of a substring within a given string....
Delete substring in string giving that substring Delete/remove a Visual C# class Deleting a Table from Database (MS Access) Deleting columns from multidimensional array Deleting rows conditionally from a DataTable Demonstrating Array of Interface Types (using runtime polymorphism) in C# dependecy walke...
browserName = nAgt.substring(nameOffset,verOffset); fullVersion = nAgt.substring(verOffset+1);if(browserName.toLowerCase()==browserName.toUpperCase()) { browserName = navigator.appName; } }// trim the fullVersion string at semicolon/space if presentif((ix=fullVersion.indexOf(";"))!=-...
.substring(first,cookie.length); var last = str.indexOf(";"); // if last cookie if (last < 0) last = str.length; // get cookie value str = str.substring(0,last).split("="); return decodeURI(str[1]); } else { return null; } } // set cookie date to the past to erase...
Answer: Use the JavaScript substring() methodYou can use the JavaScript substring() method to remove first character form a string. A typical example is removing hash (#) character from fragment identifier.Let's check out an example to understand how this method basically works:...
(stackStartFunction); var idx = out.indexOf('\n' + fn_name); if (idx >= 0) { // once we have located the function frame // we need to strip out everything before it (and its line) var next_line = out.indexOf('\n', idx + 1); out = out.substring(next_line + 1); ...