javascript - 从二维数组中的每个数组中删除特定元素

Question

我试图用数组从每个数组中删除第三个元素。

我有:

data =
[["51.9435","-4.26697","450","125"],
["51.9437","-4.26717","450","125"],
["51.9438","-4.26733","450","125"],
["51.944","-4.26748","450","125"]]

我需要什么:

data =
[["51.9435","-4.26697","125"],
["51.9437","-4.26717","125"],
["51.9438","-4.26733","125"],
["51.944","-4.26748","125"]]

我假设使用拼接，但无法想象如何将它与二维数组一起使用。

Answer 1

使用splice在每个子数组上。

const data = [["51.9435","-4.26697","450","125"],
              ["51.9437","-4.26717","450","125"],
              ["51.9438","-4.26733","450","125"],
              ["51.944","-4.26748","450","125"]]

for( const array of data )
   array.splice(2, 1)
   
console.log(data)

编辑:为了保持原始数据完整，您需要在拼接之前复制数组。

const data = [["51.9435","-4.26697","450","125"],
              ["51.9437","-4.26717","450","125"],
              ["51.9438","-4.26733","450","125"],
              ["51.944","-4.26748","450","125"]]

const converted = data.map(function(array){
   const copy = array.slice()
   copy.splice(2, 1)
   return copy
})

console.log(data)
console.log(converted)