How to Check String is Empty or Not in Javascript? In this example, we use JavaScript to check string is empty or null using !str || str.trim().length === 0;. This expression evaluates to true if the string is empty or null, and false otherwise. You can check and edit this code...
In Vue.js, how do you check if a string is empty? In Vue.js, you can check if a string is empty by using the JavaScript method 'str.length', which returns the number of characters in a string.This property returns the number of characters in the string, so if the string is empty...
var str = ' '; if(str.trim() === ''){ document.write('String is empty'); } Following is the output of the above program −String is empty So, we have seen how to check the empty string in JavaScript using the length property and trim() method. Print Page Previous Ne...
To check if a string is not null and not empty in Java, you can use the length() method of the java.lang.String class to check if the string is empty, and the != operator to check if the string is not null. Here is an example of how you can do this:
How to Check if Object is Empty in JavaScriptHere's a Code Recipe to check if an object is empty or not. For newer browsers, you can use plain vanilla JS and use the new "Object.keys" 🍦 But for older browser support, you can install the Lodash library and use their "isEmpty" ...
Afterdeclaring a string variable, use the-zoperator in anif statementto check whether a string is empty or not: MY_STRING="" if [ -z $MYSTRING ] then echo "String is empty" else echo "String is not empty" fi For more Shell scripting tips,check out or Bash/Shell scripting articles!
To check if a string is empty or not, we can use the built-in empty() function in PHP. The empty() function returns true if a string is empty; otherwise it returns false. Here is an example: $myString = ""; if (empty($myString)) { echo "string is empty"; }else{ echo "str...
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 JavaScriptChecking if a string contains a substring is one of the most common tasks in any programming language....
TheJSON.stringifymethod is used to convert a JavaScript object to a JSON string. So we can use it to convert an object to a string, and we can compare the result with{}to check if the given object is empty. Let’s go through the following example. ...
cout<<"[ERROR] string is empty!"<<endl:cout<<"string value: "<<string1<<endl;checkEmptyString(string2)?cout<<"[ERROR] string is empty!"<<endl:cout<<"string value: "<<string1<<endl;returnEXIT_SUCCESS;} Output: Use thestrlen()Function to Check if String Is Empty in C++...