Evaluate the implementation of enumeration to obtain all numbers with 1 in 1-and calculate the number with 1 in 1-javascript

Obtain all the numbers with 1 in 1-and calculate the number of 1 in 1. The following is an enumeration method, but if 1-N is used, because N may not necessarily be the number of recent lucky ones to get a small interview question, study it, and then share it, hoping to help everyone's code career.

The following is an interview question: calculate the number of 1 in 1-and calculate the number of 1 in 1.

Solution:

The Code is as follows:

// The enumeration method can only be viewed in Google Chrome
(Function (){
Var tmp = [];
For (var I = 1; I <1001; ++ I ){
/1/g. test (''+ i-1) & tmp. push (I );
}
Console. log (tmp. length)

Console. log (tmp. reduce (function (I, j ){
Return I + j
}))

})()

The above is the implementation method of enumeration, but if it is 1-N, it will not work, because N may not necessarily be much.