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Create 2125-number-of-laser-beams-in-a-bank.kt

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	`1`	`+classSolution {`
	`2`	`+funnumberOfBeams(bank:Array<String>):Int {`
	`3`	`+var prev= bank[0].count { it=='1'}`
	`4`	`+var res=0`
	`5`	`+`
	`6`	`+for (iin1 until bank.size) {`
	`7`	`+val cur= bank[i].count { it=='1'}`
	`8`	`+if (cur>0) {`
	`9`	`+ res+= (prev* cur)`
	`10`	`+ prev= cur`
	`11`	`+ }`
	`12`	`+ }`
	`13`	`+`
	`14`	`+return res`
	`15`	`+ }`
	`16`	`+}`
	`17`	`+`
	`18`	`+// or do it the kotlin way!`
	`19`	`+classSolution {`
	`20`	`+funnumberOfBeams(bank:Array<String>)= bank`
	`21`	`+ .map { it.count { it=='1' } }`
	`22`	`+ .filterNot { it==0 }`
	`23`	`+ .zipWithNext { a, b-> a* b }`
	`24`	`+ .sum()`
	`25`	`+}`

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