I have a string that looks like:

const msg = " [['robot_arm', 'bc1', 'p_09_04_00'], ['operator', 'lc1', 'p_09_15_00'], ['robot_arm', 'oc1', 'p_08_17_00']]"

And I want to split it into an array of arrays of strings, I have tried to split this string as follows:

const msg_obj = new Array(JSON.parse(msg).split("["));
console.log(msg_obj);
for (let act_id in msg_obj) { 
    console.log(msg_obj[act_id]);
}

The problem is that I get unwanted characters/strings inside:

1. Empty strings "".
2. commas ,.
3. square bracket ].

Can you please tell me if there is a better way to split this string into an array of arrays of strings without the unwanted output? thanks in advance.

CodePudding user response：

The problem is that your single quotes aren't valid JSON. You can easily get the result you want by replacing the quotes before parsing:

const msg = " [['robot_arm', 'bc1', 'p_09_04_00'], ['operator', 'lc1', 'p_09_15_00'], ['robot_arm', 'oc1', 'p_08_17_00']]"

const msg_obj = JSON.parse(msg.trim().replace(new RegExp("'", "g"), "\""));

console.log(msg_obj);
for (let act_id in msg_obj) { 
    console.log(msg_obj[act_id]);
}

CodePudding user response：

Your const msg is not a valid json string. maybe you can parse this string by this codes :

const msg = " [['robot_arm', 'bc1', 'p_09_04_00'], ['operator', 'lc1', 'p_09_15_00'], ['robot_arm', 'oc1', 'p_08_17_00']]"

msgArr = msg.split("], [").map(item => {  
    return item.trim().split(",").map(val => {
        return val.trim().replace(/\[|\'/g,'');  
    });  
})

example.png