Geek asks and answers

How can I parse this string in an array?

I have a string representation of the following array created from the Signature Pad:

var myData = "[{lx:47,ly:28,mx:47,my:27},{lx:47,ly:32,mx:47,my:28},{lx:47,ly:40,mx:47,my:32},{lx:48,ly:50,mx:47,my:40},{lx:49,ly:59,mx:48,my:50},{lx:49,ly:66,mx:49,my:59},{lx:51,ly:72,mx:49,my:66},{lx:54,ly:76,mx:51,my:72},{lx:56,ly:76,mx:54,my:76},{lx:58,ly:76,mx:56,my:76},{lx:59,ly:76,mx:58,my:76},{lx:61,ly:76,mx:59,my:76},{lx:62,ly:76,mx:61,my:76},{lx:64,ly:76,mx:62,my:76},{lx:66,ly:73,mx:64,my:76},{lx:70,ly:69,mx:66,my:73},{lx:73,ly:64,mx:70,my:69},{lx:75,ly:61,mx:73,my:64},{lx:79,ly:56,mx:75,my:61},{lx:82,ly:51,mx:79,my:56},{lx:84,ly:46,mx:82,my:51},{lx:85,ly:43,mx:84,my:46},{lx:87,ly:40,mx:85,my:43},{lx:88,ly:35,mx:87,my:40},{lx:90,ly:34,mx:88,my:35},{lx:92,ly:33,mx:90,my:34},{lx:93,ly:32,mx:92,my:33},{lx:94,ly:32,mx:93,my:32},{lx:96,ly:33,mx:94,my:32},{lx:96,ly:35,mx:96,my:33},{lx:99,ly:37,mx:96,my:35},{lx:101,ly:42,mx:99,my:37},{lx:101,ly:46,mx:101,my:42},{lx:101,ly:50,mx:101,my:46},{lx:101,ly:54,mx:101,my:50},{lx:102,ly:57,mx:101,my:54},{lx:104,ly:58,mx:102,my:57},{lx:105,ly:59,mx:104,my:58},{lx:107,ly:60,mx:105,my:59},{lx:108,ly:60,mx:107,my:60},{lx:109,ly:60,mx:108,my:60},{lx:110,ly:60,mx:109,my:60},{lx:112,ly:58,mx:110,my:60},{lx:114,ly:57,mx:112,my:58},{lx:116,ly:54,mx:114,my:57},{lx:119,ly:53,mx:116,my:54},{lx:120,ly:50,mx:119,my:53},{lx:123,ly:49,mx:120,my:50},{lx:127,ly:48,mx:123,my:49},{lx:130,ly:48,mx:127,my:48},{lx:132,ly:48,mx:130,my:48},{lx:134,ly:49,mx:132,my:48},{lx:136,ly:50,mx:134,my:49},{lx:137,ly:52,mx:136,my:50},{lx:139,ly:56,mx:137,my:52},{lx:140,ly:59,mx:139,my:56},{lx:140,ly:60,mx:140,my:59},{lx:143,ly:61,mx:140,my:60},{lx:144,ly:61,mx:143,my:61},{lx:146,ly:61,mx:144,my:61},{lx:151,ly:61,mx:146,my:61},{lx:156,ly:61,mx:151,my:61},{lx:161,ly:61,mx:156,my:61},{lx:167,ly:60,mx:161,my:61},{lx:173,ly:60,mx:167,my:60},{lx:178,ly:60,mx:173,my:60},{lx:185,ly:60,mx:178,my:60},{lx:192,ly:60,mx:185,my:60},{lx:198,ly:60,mx:192,my:60},{lx:207,ly:60,mx:198,my:60},{lx:214,ly:60,mx:207,my:60},{lx:221,ly:60,mx:214,my:60},{lx:226,ly:60,mx:221,my:60},{lx:229,ly:60,mx:226,my:60},{lx:233,ly:60,mx:229,my:60},{lx:234,ly:60,mx:233,my:60},{lx:235,ly:60,mx:234,my:60},{lx:237,ly:60,mx:235,my:60},{lx:238,ly:60,mx:237,my:60},{lx:239,ly:60,mx:238,my:60},{lx:241,ly:60,mx:239,my:60},{lx:244,ly:60,mx:241,my:60},{lx:245,ly:60,mx:244,my:60},{lx:246,ly:60,mx:245,my:60},{lx:248,ly:59,mx:246,my:60},{lx:248,ly:58,mx:248,my:59},{lx:248,ly:57,mx:248,my:58}]";

I tried converting it to an array:

JSON.parse(myData);

But I get the following error message:

SyntaxError: Unexpected token l

What am I doing wrong? I see no error :( I tried to insert the exact data without quotes in the console and created an array:

var myData = [{lx:47,ly:28,mx:47,my:27},{lx:47,ly:32,mx:47,my:28},{lx:47,ly:40,mx:47,my:32},{lx:48,ly:50,mx:47,my:40},{lx:49,ly:59,mx:48,my:50},{lx:49,ly:66,mx:49,my:59},{lx:51,ly:72,mx:49,my:66},{lx:54,ly:76,mx:51,my:72},{lx:56,ly:76,mx:54,my:76},{lx:58,ly:76,mx:56,my:76},{lx:59,ly:76,mx:58,my:76},{lx:61,ly:76,mx:59,my:76},{lx:62,ly:76,mx:61,my:76},{lx:64,ly:76,mx:62,my:76},{lx:66,ly:73,mx:64,my:76},{lx:70,ly:69,mx:66,my:73},{lx:73,ly:64,mx:70,my:69},{lx:75,ly:61,mx:73,my:64},{lx:79,ly:56,mx:75,my:61},{lx:82,ly:51,mx:79,my:56},{lx:84,ly:46,mx:82,my:51},{lx:85,ly:43,mx:84,my:46},{lx:87,ly:40,mx:85,my:43},{lx:88,ly:35,mx:87,my:40},{lx:90,ly:34,mx:88,my:35},{lx:92,ly:33,mx:90,my:34},{lx:93,ly:32,mx:92,my:33},{lx:94,ly:32,mx:93,my:32},{lx:96,ly:33,mx:94,my:32},{lx:96,ly:35,mx:96,my:33},{lx:99,ly:37,mx:96,my:35},{lx:101,ly:42,mx:99,my:37},{lx:101,ly:46,mx:101,my:42},{lx:101,ly:50,mx:101,my:46},{lx:101,ly:54,mx:101,my:50},{lx:102,ly:57,mx:101,my:54},{lx:104,ly:58,mx:102,my:57},{lx:105,ly:59,mx:104,my:58},{lx:107,ly:60,mx:105,my:59},{lx:108,ly:60,mx:107,my:60},{lx:109,ly:60,mx:108,my:60},{lx:110,ly:60,mx:109,my:60},{lx:112,ly:58,mx:110,my:60},{lx:114,ly:57,mx:112,my:58},{lx:116,ly:54,mx:114,my:57},{lx:119,ly:53,mx:116,my:54},{lx:120,ly:50,mx:119,my:53},{lx:123,ly:49,mx:120,my:50},{lx:127,ly:48,mx:123,my:49},{lx:130,ly:48,mx:127,my:48},{lx:132,ly:48,mx:130,my:48},{lx:134,ly:49,mx:132,my:48},{lx:136,ly:50,mx:134,my:49},{lx:137,ly:52,mx:136,my:50},{lx:139,ly:56,mx:137,my:52},{lx:140,ly:59,mx:139,my:56},{lx:140,ly:60,mx:140,my:59},{lx:143,ly:61,mx:140,my:60},{lx:144,ly:61,mx:143,my:61},{lx:146,ly:61,mx:144,my:61},{lx:151,ly:61,mx:146,my:61},{lx:156,ly:61,mx:151,my:61},{lx:161,ly:61,mx:156,my:61},{lx:167,ly:60,mx:161,my:61},{lx:173,ly:60,mx:167,my:60},{lx:178,ly:60,mx:173,my:60},{lx:185,ly:60,mx:178,my:60},{lx:192,ly:60,mx:185,my:60},{lx:198,ly:60,mx:192,my:60},{lx:207,ly:60,mx:198,my:60},{lx:214,ly:60,mx:207,my:60},{lx:221,ly:60,mx:214,my:60},{lx:226,ly:60,mx:221,my:60},{lx:229,ly:60,mx:226,my:60},{lx:233,ly:60,mx:229,my:60},{lx:234,ly:60,mx:233,my:60},{lx:235,ly:60,mx:234,my:60},{lx:237,ly:60,mx:235,my:60},{lx:238,ly:60,mx:237,my:60},{lx:239,ly:60,mx:238,my:60},{lx:241,ly:60,mx:239,my:60},{lx:244,ly:60,mx:241,my:60},{lx:245,ly:60,mx:244,my:60},{lx:246,ly:60,mx:245,my:60},{lx:248,ly:59,mx:246,my:60},{lx:248,ly:58,mx:248,my:59},{lx:248,ly:57,mx:248,my:58}];
+5
source share
5 answers

The JSON specification is more stringent than JavaScript itself. In particular, JSON requires that all keys of objects be enclosed in double quotes. In the JSON spec, the object key must be a string token, and the string marker begins and ends with a double quote character.

Thus, you need to specify your object keys:

var myData = '[{"lx":47,"ly":28,"mx":47,"my":27},...'

. API getSignatureString() JSON.

+3

. "lx" lx

var myData = '[{"lx":47,"ly":28 // and so on
+10

json . ,

var myData = '[{"lx":47,"ly":28 ....}

json.org

+3

, javascript (: JSON), eval. :

var myData = eval("[{lx:47,ly:28,mx:47,my:27}]");

, , ,

+2

myData JSON, JSON-, , :

var myData = '[{"lx":47,"ly":28,"mx":47,"my":27},...]';
+1

More articles:


All Articles