题解 | #二维数组中的查找#
二维数组中的查找
https://www.nowcoder.com/practice/abc3fe2ce8e146608e868a70efebf62e
export function Find(target: number, array: number[][]): boolean {
// write code here
let rowLen = array[0].length ;
let columnLen = array.length;
for(let i = 0 ; i < columnLen ; i ++){
if(target < array[i][0] || target > array[i][rowLen-1])continue;
let low:number = 0;
let high:number = rowLen-1;
let div:number = 0;
while(low <= high){
div = Math.floor((high + low)/2);
if(target == array[i][div])return true;
else if(target < array[i][div]){
high = div-1;
}else low = div+1;
}
}
return false
}
本题所用的方法主要为二分查找法的思想，同时判断根据某个一维数组的最值判断target是否在数组范围内实现优化
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