To check for null or undefined in TypeScript, use a comparison to check if the value is equal or is not equal to null or undefined.
Check example below:
To check for null or undefined in TypeScript, use a comparison to check if the value is equal or is not equal to null or undefined.
Check example below:
In below example will see how to filter numeric value (1-9) and remove all unnecessary characters and if 1st character is zero from a string by using regular expression and charAt method.
In below example will see how to filter numeric value (0-9) and remove all unnecessary characters from a string by using regular expression.
In objectItems
variable has some array of items. I have checked and compaire productId
exists and productId equal 2
in object objectItems?
This is work for me. Here in objectItems
has some array of object items. I have checked and compaire eventId
and productId
exists and eventId equal 5
& productId equal 10
in object objectItems?