I try to test a specific string with a switch case and I find this code :
let prop = "date myData";
switch (true) {
case /str/.test(prop) :
console.log("tata");
break;
case /date/.test(prop):
console.log("toto");
break;
case /enum/.test(prop) :
console.log("titi");
break
default :
console.log("Nada");
break;
}
It works but it don't resolve my problem. I want to get specifically the string "date" for example. With nothing before and nothing after.
I this example, I want my console to display "Nada".
I don't know how to do that with this code. A solution ? :)
You need either start and end signs in the regular expression
/^date$/
or a simple test with a string and equality
prop === 'date'
or
switch (prop) {
case 'date':
console.log('date');
break;
}
For what you have there a switch is not your first choice - also you are just comparing strings for equality - so an easier way would be the following
let prop = "date myData"; let strings = {str: "tata", date: "toto", enum:"titi"} let res = strings[prop] || "Nada"; console.log(res);
To test for equality to multiple strings, either stack case statements like this:
switch (true) {
case prop === "date":
case prop === "param2":
// Do something
break;
}
Or test for inclusion in a static array:
switch (true) {
case ["date", "param2"].includes(prop):
// Do something
break;
}
Although switching on true
is probably not the most efficient way to do this.
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