我有一个名为Data_Array的非常数组的数据。如何仅获取数据的第5和第6个索引?以自动方式。
var Data_Array = ["BETA 135 MEMB 3 6",
"MATERIAL STEELAPPROX ALL",
"SUPPORTS",
"5 13 16 22 24 PINNED",
"20 FIXED",
"7 FIXED BUT FX KFY 200",
"9 FIXED BUT FZ MX KFY 150 KMZ 200",
"LOAD 1 LOADTYPE Dead TITLE DEAD",
"SELFWEIGHT Y -1",
"LOAD 2 LOADTYPE Live TITLE LIVE"]
我试图达到以下价值:
["7 FIXED BUT FX KFY 200",
"9 FIXED BUT FZ MX KFY 150 KMZ 200"]
我正在尝试创建一个代码,在该代码中,它会计算所有数组,然后在检测到单词FIXED时停止。然后从那里返回它的array.length然后(那将是第一个索引)。然后计数直到Load(这将是第二个索引)。所以代码
function countIndex(array, str1, str2){
count until Fixed then = gives 5
count until Load then = give 7
}
Array.splice(1st_index,2nd_index);
我实际上有代码执行此操作,但它无法检测不在元素的第一个索引中的字符串。现在字符串“FIXED”不在第一个索引中,它将无法工作。仅当str1和str2值是数组中元素的第一个索引时,它才有效。
function pullAllDataBetween(data, str1, str2) {
var string_nodes = [];
var append = false;
for (var i = 0; i < data.length; i++) {
if (data[i] === str1) {
append = true;
continue;
} else if (data[i] === str2) {
append = false;
break;
}
if (append) {
string_nodes.push(data[i]);
}
}
return string_nodes;
}
console.log(Data_Array.slice(5, 7));
OUTPUT:
[ '7 FIXED BUT FX KFY 200',
'9 FIXED BUT FZ MX KFY 150 KMZ 200' ]
var Data_Array = ["BETA 135 MEMB 3 6",
"MATERIAL STEELAPPROX ALL",
"SUPPORTS",
"5 13 16 22 24 PINNED",
"20 FIXED",
"7 FIXED BUT FX KFY 200",
"9 FIXED BUT FZ MX KFY 150 KMZ 200",
"LOAD 1 LOADTYPE Dead TITLE DEAD",
"SELFWEIGHT Y -1",
"LOAD 2 LOADTYPE Live TITLE LIVE"];
console.log(Data_Array.slice(5, 7));
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice
要获取仅包含the word FIXED
的字符串的数组并获得它的长度:
var Data_Array = ["BETA 135 MEMB 3 6",
"MATERIAL STEELAPPROX ALL",
"SUPPORTS",
"5 13 16 22 24 PINNED",
"20 FIXED",
"7 FIXED BUT FX KFY 200",
"9 FIXED BUT FZ MX KFY 150 KMZ 200",
"LOAD 1 LOADTYPE Dead TITLE DEAD",
"SELFWEIGHT Y -1",
"LOAD 2 LOADTYPE Live TITLE LIVE"];
var arr = Data_Array.filter(line => /FIXED/.test(line));
console.log(arr);
console.log(arr.length);
function count(arr, str){
for(var i = 0; i<arr.length;i++){
if(arr[i].indexOf(str)!==-1)
return i;
}
}
console.log(count(Data_Array, "FIXED"));
console.log(count(Data_Array, "LOAD"));