I want to display only uniq values when I'm using filter
For example, I have this:
const test = 'This is Right';
const test1 = 'This is wrong';
const test2 = 'This is Right';
const test3 = 'The word is hello'
const result = [test, test1, test2, test3].filter(value => value).join(' - ');
console.log(result);
The output is:
This is Right - This is wrong - This is Right - The word is hello
What I want :
This is Right - This is wrong - The word is hello
I already see some same issues but I don't wanna work with array. Thanks for your help
1) You can get unique value using Set
const test = "This is Right";
const test1 = "This is wrong";
const test2 = "This is Right";
const test3 = "The word is hello";
const set = new Set().add(test).add(test1).add(test2).add(test3);
const result = [...set].join(" - ");
console.log(result);2) Using Array literal with Set
const test = "This is Right";
const test1 = "This is wrong";
const test2 = "This is Right";
const test3 = "The word is hello";
const set = new Set([test, test1, test2, test3]);
const result = [...set].join(" - ");
console.log(result);3) Use with Array only
const test = "This is Right";
const test1 = "This is wrong";
const test2 = "This is Right";
const test3 = "The word is hello";
const dict = [];
const result = [test, test1, test2, test3]
.filter((value) => {
if (!dict.includes(value)) {
dict.push(value);
return true;
}
return false;
})
.join(" - ");
console.log(result);You could use Set and initialize it with an array of strings
const test = 'This is Right';
const test1 = 'This is wrong';
const test2 = 'This is Right';
const test3 = 'The word is hello';
const m = new Set([test, test1, test2, test3])
console.log([...m].join(' - '))
As you can see this is short version of @decpk
const test = "This is Right";
const test1 = "This is wrong";
const test2 = "This is Right";
const test3 = "The word is hello";
const result = [...new Set([test, test1, test2, test3])].join(" - ");
console.log(result);As you can see this actually use array [test, test1, test2, test3] create a Set will delete duplicate then use join for create string.
You can use filter like:
const test = "This is Right";
const test1 = "This is wrong";
const test2 = "This is Right";
const test3 = "The word is hello";
const result = [test, test1, test2, test3].filter((value, index, self) => self.indexOf(value) === index).join(" - ");
console.log(result);