Javascript/Jquery 将字符串转换为数组
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Javascript/Jquery Convert string to array
提问by maaz
i have a string
我有一个字符串
var traingIds = "${triningIdArray}"; // ${triningIdArray} this value getting from server
alert(traingIds) // alerts [1,2]
var type = typeof(traingIds )
alert(type) // // alerts String
now i want to convert this to array so that i can iterate
现在我想将其转换为数组，以便我可以迭代
i tried
我试过
var trainindIdArray = traingIds.split(',');
$.each(trainindIdArray, function(index, value) {
alert(index + ': ' + value); // alerts 0:[1 , and 1:2]
});
how to resolve this?
如何解决这个问题？
采纳答案by Utkanos
Assuming, as seems to be the case, ${triningIdArray}is a server-side placeholder that is replaced with JS array-literal syntax, just lose the quotes. So:
假设，似乎是这种情况，${triningIdArray}是用 JS 数组文字语法替换的服务器端占位符，只需丢失引号。所以：
var traingIds = ${triningIdArray};
not
不是
var traingIds = "${triningIdArray}";
回答by Joseph
Since array literal notation is still valid JSON, you can use JSON.parse()to convert that string into an array, and from there, use it's values.
由于数组文字表示法仍然是有效的 JSON，您可以使用JSON.parse()该字符串将该字符串转换为数组，然后从那里使用它的值。
var test = "[1,2]";
parsedTest = JSON.parse(test); //an array [1,2]
//access like and array
console.log(parsedTest[0]); //1
console.log(parsedTest[1]); //2
回答by Clyde Lobo
Change
改变
var trainindIdArray = traingIds.split(',');
var trainindIdArray = traingIds.split(',');
to
到
var trainindIdArray = traingIds.replace("[","").replace("]","").split(',');
var trainindIdArray = traingIds.replace("[","").replace("]","").split(',');
That will basically remove [and ]and then split the string
这将基本上去除[和]再分割字符串
回答by Clayton
check this out :)
看一下这个 ：）
var traingIds = "[1,2]"; // ${triningIdArray} this value getting from server
alert(traingIds); // alerts [1,2]
var type = typeof(traingIds);
alert(type); // // alerts String
//remove square brackets
traingIds = traingIds.replace('[','');
traingIds = traingIds.replace(']','');
alert(traingIds); // alerts 1,2
var trainindIdArray = traingIds.split(',');
?for(i = 0; i< trainindIdArray.length; i++){
alert(trainindIdArray[i]); //outputs individual numbers in array
}?
