[英]slice array with a specific string
How do I split an array of arrays by searching for a specific string?如何通过搜索特定字符串来拆分 arrays 的数组? I have an array of hundreds of objects.
我有一个包含数百个对象的数组。 I want to split the string at the specific string which is at a random place for each object. I want to remove everything that comes after the 'specific string' and the 'specific string' array.
我想在每个 object 随机位置的特定字符串处拆分字符串。我想删除“特定字符串”和“特定字符串”数组之后的所有内容。
I have arrays that look like this我有 arrays 看起来像这样
array =
[{
"post": 1,
"arr":
{
"categories":
[
[
"string 1"
],
[
"string 2"
],
[
"string 3"
],
[
"specific string"
],
[
"string 4"
],
[
"string 5"
],
[
"string 6"
],
[
"string 7"
]
]
}
},
{
"post": 3,
"arr":
{
"categories":
[
[
"string 1"
],
[
"string 2"
],
[
"specific string"
],
[
"string 3"
],
[
"string 4"
],
[
"string 5"
],
[
"string 6"
],
[
"string 7"
]
]
}
},
{
"post": 2,
"arr":
{
"categories":
[
[
"string 1"
],
[
"string 2"
],
[
"string 3"
],
[
"string 4"
],
[
"string 5"
],
[
"specific string"
],
[
"string 6"
],
[
"string 7"
],
[
"string 8"
]
]
}
}
]
i want my output array to look like this我希望我的 output 数组看起来像这样
[{
"post": 1,
"arr":
{
"categories":
[
[
"string 1"
],
[
"string 2"
],
[
"string 3"
]
]
}
},
{
"post": 3,
"arr":
{
"categories":
[
[
"string 1"
],
[
"string 2"
]
]
}
},
{
"post": 2,
"arr":
{
"categories":
[
[
"string 1"
],
[
"string 2"
],
[
"string 3"
],
[
"string 4"
],
[
"string 5"
]
]
}
}
]
I know slice doesnt work with strings but this is kind of what I wanted to achieve with code我知道 slice 不适用于字符串,但这是我想用代码实现的
for(var i=0, len = array.length; i < len; i++){
array[0].arr['categories'].slice(0,'specific string');
}
You could find the index of wanted array and slice the array.您可以找到所需数组的索引并对数组进行切片。
const array = [{ post: 1, arr: { categories: [["string 1"], ["string 2"], ["string 3"], ["specific string"], ["string 4"], ["string 5"], ["string 6"], ["string 7"]] } }, { post: 3, arr: { categories: [["string 1"], ["string 2"], ["specific string"], ["string 3"], ["string 4"], ["string 5"], ["string 6"], ["string 7"]] } }, { post: 2, arr: { categories: [["string 1"], ["string 2"], ["string 3"], ["string 4"], ["string 5"], ["specific string"], ["string 6"], ["string 7"], ["string 8"]] } }], result = array.map(({ arr: { categories }, ...o }) => ({...o, arr: { categories: categories.slice(0, categories.findIndex(([s]) => s === "specific string")) } })); console.log(result);
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