Apr 14, 2011 · If one of the operands is a boolean, convert the boolean operand to 1 if it is true and +0 if it is false. When comparing a number to a string, try to convert the string to a numeric value. from MDN Equality Operators page

May 22, 2012 · However, the includes() method can simply be used: exampleMethode(): boolean { return ['string1', 'string2'].includes(this.exampleObject); } The return of this method will do what you want in a simple way. Compares the object string with the string array you want to check, and returns a boolean.

Sep 9, 2014 · Should you use == or === to compare with Boolean / boolean values in js? Problem is: > true == new Boolean(true) < true > true === new Boolean(true) < false same goes for String: &g...

Jul 30, 2019 · I unintentionally found this JavaScript meme on Reddit, and it's the best one I've ever seen. You can verify this meme's accuracy by running each code snippet in Developer Tools. The result isn't surprising, but still kind of disappointing.

When comparing different types in Javascript, it will try to convert one of the operands to the other's type. When an empty array is converted into an integer, it returns a 0. When an array is converted into a string, it returns an empty string ("").

Aug 20, 2024 · Here‘s what the ECMAScript 5 specification says: If Type (x) is Number and Type (y) is String, return the result of the comparison x == ToNumber (y). So "0" gets coerced to a number using ToNumber() before comparing values. ToNumber("0") evaluates to 0. Therefore, 0 == 0 evaluates to true.

Converting a one-element array to a string is akin to converting the contained element to the string: [ "property" ] . toString ( ) ; // -> 'property' Number.toFixed() display different numbers

Oct 4, 2023 · Whether you love or hate JavaScript, here are 5 memes that describe my feelings for the programming language. Hope you enjoy! 1. The JavaScript Developer Starter Pack. 2. Do JavaScript...

In JS, when you compare two values with different types with "==", you cast one of the values to the corresponding type. As I said earlier, true is casted into a 1, and therefore, this happens. 13) true === 1. The triple equal means that if they're of different type, it will return false, and because a boolean is not a number, it returns false.

Nov 12, 2024 · For example, if you try to compare a number and a string: 1 == "1" // true. Behind the scenes, JavaScript will convert the string "1" to the number 1 under the hood. This allows the comparison to take place between two numbers rather than a number and a string. The same goes for many other data type combinations: