関連ワード:  typescript get first and last element of array    typescript get first element of array    typescript get first element of array if exists    typescript get first element of array that matches condition    typescript get first element of array or undefined    typescript get first element of array or null    typescript get first element of array with condition    typescript get first element of array safely    typescript get first element of array if not empty    typescript get first element of array if not undefined  
結果 : typescript get first and last element of array