Is there any specific value that will always result in a true comparison in JavaScript?

Question

Is there any specific value that will always result in a true comparison in JavaScript?

Is there a special JavaScript value that will always make a comparison true?

For example using the less than operator:

true < 10           true
false < 10          true
null < 10           true

Or using the greater than operator:

true > 10           false
false > 10          false
null > 10           false

What I am looking for:

alwaysTrue < 10     true
alwaysTrue > 10     true

I want to have a value that will always return true when compared, in order to set one part of an if statement to return true by default, and then be able to switch between true and false based on other comparison values.

Although I suspect this value does not exist, I want to confirm it fully.

javascript comparison operators

Answer 1

Answer №1

To enhance your condition, consider incorporating the use of "or" along with another variable that has the ability to determine whether the condition should return true or false.

returnTrue || testVariable < 10

When returnTrue is true, the above code will always return true; otherwise, it will rely on the comparison. If you only need to detect a change in a variable, you can achieve this by storing the previous value. To handle cases where the value might be null, you can check for this specifically or employ the "or" operator with a flag, similar to the example above.

oldValue === null || currentValue === oldValue

Answer 2

To enhance your condition, consider incorporating the use of "or" along with another variable that has the ability to determine whether the condition should return true or false.

returnTrue || testVariable < 10

When returnTrue is true, the above code will always return true; otherwise, it will rely on the comparison. If you only need to detect a change in a variable, you can achieve this by storing the previous value. To handle cases where the value might be null, you can check for this specifically or employ the "or" operator with a flag, similar to the example above.

oldValue === null || currentValue === oldValue

Answer 3

Answer №2

Perhaps this method may not match your exact query, but here is an alternative approach with additional statements:

var conditionMet = true;

if (oldCompareValue != newCompareValue) {
   // Next step is to include the return expression
   // I'm unsure about the specific requirement for this
   conditionMet = (newCompareValue > 10)? true: false;
}

return conditionMet;

You can also fulfill this using the requested AND operator:

conditionMet = true;

if ((oldCompareValue != newCompareValue) && true) {
   conditionMet = (newCompareValue > 10)? true: false;
}

return conditionMet;

The if statement executes as follows:

If oldCompareValue equals newCompareValue, the entire statement is false
If oldCompareValue doesn't equal newCompareValue, the entire statement is true

In both scenarios, the right side of the test expression always results in true, and the if statement will only be entered when the left side also passes. However, retaining that 'true' might be excessive in my opinion.

Once your logic is set, this can be condensed into a single line.

Answer 4

Perhaps this method may not match your exact query, but here is an alternative approach with additional statements:

var conditionMet = true;

if (oldCompareValue != newCompareValue) {
   // Next step is to include the return expression
   // I'm unsure about the specific requirement for this
   conditionMet = (newCompareValue > 10)? true: false;
}

return conditionMet;

You can also fulfill this using the requested AND operator:

conditionMet = true;

if ((oldCompareValue != newCompareValue) && true) {
   conditionMet = (newCompareValue > 10)? true: false;
}

return conditionMet;

The if statement executes as follows:

If oldCompareValue equals newCompareValue, the entire statement is false
If oldCompareValue doesn't equal newCompareValue, the entire statement is true

In both scenarios, the right side of the test expression always results in true, and the if statement will only be entered when the left side also passes. However, retaining that 'true' might be excessive in my opinion.

Once your logic is set, this can be condensed into a single line.

Answer 5

Answer №3

Regrettably, no such object was found. Having an item like this would be extremely beneficial when comparing missing dates, for example.

There are, however, constants that always return false:

NaN > 10 // false
NaN < 10 // false
undefined < 10 // false
undefined > 10 // false

Therefore, their negation will always be true:

!(NaN > 10) // true
!(NaN < 10) // true
!(undefined < 10) // true
!(undefined > 10) // true

You can rewrite your statement using the negation like this:

value > 10

!(value < 10)

Answer 6

Regrettably, no such object was found. Having an item like this would be extremely beneficial when comparing missing dates, for example.

There are, however, constants that always return false:

NaN > 10 // false
NaN < 10 // false
undefined < 10 // false
undefined > 10 // false

Therefore, their negation will always be true:

!(NaN > 10) // true
!(NaN < 10) // true
!(undefined < 10) // true
!(undefined > 10) // true

You can rewrite your statement using the negation like this:

value > 10

!(value < 10)

Is there any specific value that will always result in a true comparison in JavaScript?

Answer №1

Answer №2

Answer №3

Similar questions

Change the websocket origin to localhost in a javascript setting

What is the best method for eliminating the default title in selectpicker?

JavaScript Filtering Techniques

There has been an issue with parsing the JSON file due to an invalid character found at

Issues with posting form data in AngularJS are occurring

Using Vanilla JavaScript to Disable a Specific Key Combination on a Web Page

Unable to display "xyz" using console.log() function upon button click

Eliminate repeated elements by comparing two sets of data

Implementing atomic design principles in Vue 3 with TypeScript

Incorporating AJAX into ASP Classic through an include file

Learn how to easily set a radio button using Angular 4 and JavaScript

Using Vue.js to send a slot to a child component in a nested structure

Customizing Marker Images in Google Maps JavaScript API

Issue with manipulating element styles using jQuery in Angular2

When swiping right with Swiper.js, the slides are jumping by all, skipping the following slide, but the left swipe functions correctly

Enhancing gallery user experience with jquery to animate the opacity of active (hovered) thumbnails

Redux - Preventing Overwriting of Product Quantity in Cart by Creating a New Object

What is the best method for accessing the service response data when I am sending back an array of custom map with a promise as an object?

Kendo UI Scheduler: The system encountered an overflow while converting to a date and time format

Preventing data binding for a specific variable in Angular 2: Tips and tricks