Build a pyramid-shaped tower, as an array/list of strings, given a positive integer number of fllors, A tower block is represented with '*' character.
For Example,a tower with 3 floors looks like this:
[ " * ", " *** ", "*****"]
And a tower with 6 floors looks like this:
[ " * ", " *** ", " ***** ", " ******* ", " ********* ", "***********"]
我的解法：
😱----------无---------- 没-解-出-来🌚
unlock solutions
解法1：
function towerBuilder(n) {
return Array.from({length: n}, (v, k) => {
var spaces = ' '.repeat(n-k-1)
return spaces + '*'.repeat(k+k+1) + spaces
})
}
🉑剖析学习点：
String.prototype.repeat() ===> str.repeat(count)
Array.from({length:3}) ===> [undefiend, undefined, undefined]
(v, k) ===> (value, key) ===> undefined,0; undefined,1; undefined,2
解法2：
function towerBuilder(nFloors) {
var tower = []
for (var i = 0; i < nFloorsl i++) {
tower.push(' '.repeat(nFloors-i-1)
+ '*'.repeat((i*2)-1)
+ ' '.repeat(nFloors-i-1)
)
}
return tower
}
