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開始行:
* 配列の中の値がユニークか調べる [#nb36725e]
const array1 = [1,2,3,1];
if (([...new Set(array1)]).length == array1.length) {
console.log("unique");
} else {
console.log("not unique");
}
=> not unique
const array2 = [1,2,3];
if (([...new Set(array2)]).length == array2.length) {
console.log("unique");
} else {
console.log("not unique");
}
=> unique
** 参考 [#f5ee2e72]
https://stackoverflow.com/questions/9229645/remove-duplic...
終了行:
* 配列の中の値がユニークか調べる [#nb36725e]
const array1 = [1,2,3,1];
if (([...new Set(array1)]).length == array1.length) {
console.log("unique");
} else {
console.log("not unique");
}
=> not unique
const array2 = [1,2,3];
if (([...new Set(array2)]).length == array2.length) {
console.log("unique");
} else {
console.log("not unique");
}
=> unique
** 参考 [#f5ee2e72]
https://stackoverflow.com/questions/9229645/remove-duplic...
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