I need to check whether enter parameter is empty or not like php empty function works.
For example, if I have function with name isEmpty and I passed string as parameter to it then function will return true if string is empty else false and similar for other datatypes like Object, Array and Number.
let isEmpty = param => {
let isAnObject = (obj) => {
if (obj == null) return false;
return obj.constructor.name.toLowerCase() === "object"
}
if (Array.isArray(param)) {
return !param.length;
}
if (isAnObject(param)) {
return !Object.keys(param).length;
}
return !param;
}
console.log('Is empty Array: ',isEmpty([]));
console.log('Is empty Array: ',isEmpty([1,2,3]));
console.log('Is empty Object: ',isEmpty({}));
console.log('Is empty Object: ',isEmpty({a: 'I am not empty'}));
console.log('Is empty String: ',isEmpty(''));
console.log('Is empty String: ',isEmpty('I am string'));
console.log('Is empty Number: ',isEmpty(NaN));
console.log('Is empty Number: ',isEmpty(100));
console.log('Is empty String parse as number: ',isEmpty(parseInt('')));I have created a function and named it as isEmpty. This function will return true if passed parameter is empty else false.
empty function that will check the enter parameter is empty or not irrespective of it's datatype but JavaScript do not have such function that will works like php empty function works. But above provided function will works for all datatypes as developer required such type of code that will help or say reduced their work. So I have created this function. Thanks
== comparison to null or undefined.
Most of the "empty" things are falsy in JS, so it can be simplified to:
const isEmpty = thing => typeof thing === "object" ? !thing || !Object.keys(thing).length : !thing && thing !== 0;
let jqcc = (function(){
var checkEmptyValues = function(param) {
if (param == null) {
return false;
}
if (Array.isArray(param)) {
return !param.length;
}
if (param.constructor.name.toLowerCase() === "object") {
return !Object.keys(param).length;
}
return !param;
}
return {
isEmpty: function(param){
return checkEmptyValues(param);
}
}
})();
console.log(jqcc.isEmpty([]));