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homework
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function printTri(size, isBlank) { | |
// validate | |
if (isBlank && size < 3) { | |
console.log('Size should mor than 3'); | |
return false; | |
} | |
var i; | |
var star; | |
var blank; | |
for(i = 1; i <= size; i++) { | |
star = (2*i) - 1; | |
blank = size - i; | |
if (size == i) { | |
isBlank = false; | |
} | |
console.log(getBlankText(blank) + getStarText(star, isBlank)); | |
} | |
} | |
function getStarText(star, isBlank) { | |
var i = 0; | |
var starText = ''; | |
for (i = 0; i < star; i++) { | |
if (!isBlank) { | |
starText += '*'; | |
} | |
else { | |
if (i === 0 || i == (star - 1)){ | |
starText += '*'; | |
} | |
else { | |
starText += ' '; | |
} | |
} | |
} | |
return starText; | |
} | |
function getBlankText(star) { | |
var i = 0; | |
var starText = ''; | |
for (i = 0; i < star; i++) { | |
starText += ' '; | |
} | |
return starText; | |
} | |
printTri(5); | |
printTri(5, true); |
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Comment : code style
getBlankText()
แต่ว่าตั้งชื่อตัวแปรเป็นstarText
comment อื่นๆ
โอเคหมดแล้ว เรียบง่าย ฉับไว