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javascript equivalent of mysql char - javascript

I insert a byte array to mysql using
CHAR(2,3,5)
I wanted to directly insert the character string so I tried inserting the result of
String.fromCharCode.apply(null, bytearray)
But I'm not getting the same result. Anyone know what I'm doing wrong?
Edit: Here is the array I'm trying on. I tried escaping with the methods at Making a javascript string sql friendly but the value inserted is not the same
[255,216,255,224,0,16,74,70,73,70,0,1,1,1,0,96,0,96,0,0,255,219,0,67,0,8,6,6,7,6,5,8,7,7,7,9,9,8,10,12,20,13,12,11,11,12,25,18,19,15,20,29,26,31,30,29,26,28,28,32,36,46,39,32,34,44,35,28,28,40,55,41,44,48,49,52,52,52,31,39,57,61,56,50,60,46,51,52,50,255,219,0,67,1,9,9,9,12,11,12,24,13,13,24,50,33,28,33,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,50,255,192,0,17,8,0,102,0,242,3,1,34,0,2,17,1,3,17,1,255,196,0,31,0,0,1,5,1,1,1,1,1,1,0,0,0,0,0,0,0,0,1,2,3,4,5,6,7,8,9,10,11,255,196,0,181,16,0,2,1,3,3,2,4,3,5,5,4,4,0,0,1,125,1,2,3,0,4,17,5,18,33,49,65,6,19,81,97,7,34,113,20,50,129,145,161,8,35,66,177,193,21,82,209,240,36,51,98,114,130,9,10,22,23,24,25,26,37,38,39,40,41,42,52,53,54,55,56,57,58,67,68,69,70,71,72,73,74,83,84,85,86,87,88,89,90,99,100,101,102,103,104,105,106,115,116,117,118,119,120,121,122,131,132,133,134,135,136,137,138,146,147,148,149,150,151,152,153,154,162,163,164,165,166,167,168,169,170,178,179,180,181,182,183,184,185,186,194,195,196,197,198,199,200,201,202,210,211,212,213,214,215,216,217,218,225,226,227,228,229,230,231,232,233,234,241,242,243,244,245,246,247,248,249,250,255,196,0,31,1,0,3,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,1,2,3,4,5,6,7,8,9,10,11,255,196,0,181,17,0,2,1,2,4,4,3,4,7,5,4,4,0,1,2,119,0,1,2,3,17,4,5,33,49,6,18,65,81,7,97,113,19,34,50,129,8,20,66,145,161,177,193,9,35,51,82,240,21,98,114,209,10,22,36,52,225,37,241,23,24,25,26,38,39,40,41,42,53,54,55,56,57,58,67,68,69,70,71,72,73,74,83,84,85,86,87,88,89,90,99,100,101,102,103,104,105,106,115,116,117,118,119,120,121,122,130,131,132,133,134,135,136,137,138,146,147,148,149,150,151,152,153,154,162,163,164,165,166,167,168,169,170,178,179,180,181,182,183,184,185,186,194,195,196,197,198,199,200,201,202,210,211,212,213,214,215,216,217,218,226,227,228,229,230,231,232,233,234,242,243,244,245,246,247,248,249,250,255,218,0,12,3,1,0,2,17,3,17,0,63,0,247,250,40,162,128,10,40,162,128,10,40,162,128,10,42,148,58,149,141,197,228,246,112,94,219,203,117,6,60,232,18,85,103,143,61,55,40,57,31,141,93,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,243,207,0,248,187,83,241,31,139,124,105,167,94,180,70,223,73,191,16,91,4,76,16,187,229,94,79,127,245,96,254,38,189,14,128,10,40,162,128,10,40,162,128,10,40,162,128,10,40,162,128,10,40,162,128,10,40,162,128,10,40,162,128,10,40,162,128,10,40,162,128,10,40,170,247,55,48,89,219,73,115,117,52,112,195,18,238,121,36,96,170,163,212,147,210,128,62,87,211,117,75,173,51,246,135,158,91,89,74,180,254,32,150,214,64,122,52,114,78,81,129,31,67,199,161,0,246,175,172,43,231,79,132,246,86,126,37,248,193,226,79,16,45,186,220,216,67,44,247,22,210,200,188,163,203,54,99,108,30,251,3,245,233,245,175,160,231,18,52,18,8,164,242,228,101,33,28,174,237,167,28,28,119,250,80,5,138,42,165,162,92,69,105,10,93,76,179,220,42,42,203,40,143,96,145,128,229,130,228,237,4,243,140,156,85,186,0,40,162,138,0,40,162,138,0,40,170,211,220,67,105,109,45,205,196,139,20,16,161,146,71,99,128,170,6,73,62,192,87,155,234,95,30,252,17,98,232,182,243,223,106,27,179,184,218,219,16,19,235,230,20,253,51,64,25,63,5,174,225,212,60,105,241,18,246,217,183,193,113,168,164,177,183,170,180,151,4,31,200,215,179,215,201,255,0,9,117,207,23,105,82,234,182,190,17,208,161,212,238,46,140,38,103,152,31,46,16,130,76,2,119,40,5,183,28,101,191,132,224,26,246,175,10,107,31,19,46,245,200,225,241,63,134,180,219,61,49,149,183,207,4,203,189,8,31,46,0,149,243,147,129,208,122,230,128,61,26,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,43,230,31,11,199,227,239,24,105,250,198,165,166,120,195,84,26,222,157,114,187,244,183,153,227,70,13,146,48,75,132,7,42,227,97,92,124,189,121,160,15,166,93,214,36,46,236,21,84,101,153,142,0,30,166,188,35,197,26,237,199,197,255,0,22,218,248,71,195,151,51,199,161,66,75,223,222,170,157,146,129,200,36,119,80,70,23,61,88,231,176,53,207,106,126,60,248,145,227,86,159,194,54,182,150,223,104,230,59,175,236,193,146,235,247,72,121,119,178,5,57,228,130,7,108,246,174,131,64,180,248,191,225,143,13,38,135,163,248,79,76,182,137,3,98,224,205,19,76,89,142,75,146,102,218,91,234,184,192,3,28,80,5,255,0,131,145,89,120,127,196,191,17,45,214,68,182,176,176,189,72,149,166,147,11,28,105,37,194,140,177,246,3,147,93,126,139,241,107,195,58,255,0,139,7,135,244,215,187,150,225,247,136,167,242,128,138,82,170,88,237,57,207,69,60,144,7,21,226,250,63,129,188,73,175,252,66,215,124,39,170,235,107,103,53,202,46,163,170,180,11,189,102,108,171,129,180,109,4,134,159,253,208,115,140,224,87,75,174,71,225,191,135,63,27,124,46,193,87,78,210,109,52,182,50,56,70,115,185,190,208,187,155,0,179,18,72,25,231,242,20,1,239,146,203,29,188,77,44,210,44,113,160,203,59,176,1,71,169,38,184,125,47,226,199,134,117,159,25,31,13,89,75,59,221,23,100,142,227,98,249,18,178,130,72,86,221,147,208,224,227,7,177,228,87,207,223,20,252,108,254,44,241,101,217,177,212,174,46,52,56,202,125,146,54,220,137,194,0,205,176,227,146,219,185,35,56,165,208,124,37,170,120,123,197,30,6,212,181,40,146,8,245,93,78,7,182,140,182,95,98,203,17,220,195,176,33,198,57,207,92,129,64,30,219,241,223,88,187,210,190,29,108,180,144,198,111,175,35,182,145,215,33,130,109,119,56,35,212,160,31,66,106,166,187,227,185,60,51,240,159,195,113,218,59,220,107,250,174,153,109,21,178,110,221,32,102,137,65,148,247,56,39,143,86,35,222,184,15,139,58,246,177,227,91,205,98,43,91,53,139,69,240,173,201,138,225,252,223,153,228,119,242,131,21,207,63,50,182,48,56,4,228,243,93,23,193,159,11,220,107,215,22,254,52,215,85,38,75,104,18,199,75,137,211,133,16,170,160,144,118,227,105,3,253,173,199,131,138,0,185,240,33,181,65,171,248,198,203,88,187,158,123,203,91,152,99,155,205,152,201,137,1,153,95,146,78,121,81,207,176,175,109,175,31,248,65,255,0,37,15,226,111,253,133,71,254,141,184,172,143,137,190,55,190,241,70,177,23,129,188,31,114,175,36,187,197,236,203,42,162,182,209,184,160,114,70,2,133,98,199,191,79,80,64,58,143,132,94,57,186,241,222,139,170,38,174,99,146,242,218,227,14,137,16,84,242,100,31,32,247,229,100,31,64,51,93,99,88,120,119,193,186,109,254,179,107,164,233,246,9,4,13,36,207,107,109,28,76,202,163,59,114,160,103,167,79,90,241,159,128,23,31,217,222,55,241,38,129,20,144,221,66,208,249,130,234,34,118,191,147,38,192,87,253,150,18,147,248,10,191,241,175,197,55,186,174,160,254,12,209,188,169,97,134,213,175,181,7,71,228,121,74,242,24,219,176,1,84,55,185,42,61,136,5,255,0,217,199,76,72,60,47,171,234,185,97,37,213,226,193,130,56,219,26,2,8,252,101,97,248,87,171,77,175,105,118,250,237,190,139,45,236,73,169,92,198,210,195,108,79,204,234,51,146,63,35,249,31,67,92,159,193,63,249,36,58,31,253,188,127,232,249,43,135,109,126,223,95,253,168,116,150,181,120,228,130,198,222,75,69,150,54,220,28,136,38,118,63,131,59,47,252,6,128,61,151,88,215,116,191,15,217,139,189,86,246,43,75,118,145,98,18,74,120,44,122,15,208,254,70,181,43,193,63,104,191,17,219,181,166,155,225,168,128,121,196,191,109,159,158,99,1,89,16,126,59,152,254,3,214,189,191,79,190,135,83,211,45,53,11,99,186,11,168,82,104,207,170,176,4,126,134,128,41,107,190,33,210,252,55,167,127,104,107,23,169,107,108,28,70,29,129,57,99,208,0,1,36,240,122,14,198,175,217,94,218,234,86,80,222,89,207,28,246,211,32,120,229,141,178,172,15,112,107,196,117,155,91,255,0,140,95,16,245,29,21,223,236,90,15,135,100,146,25,74,182,93,230,59,144,54,59,146,200,113,232,160,247,53,119,225,86,175,168,120,91,197,55,95,14,117,195,33,16,25,31,74,145,161,216,36,64,206,204,71,114,24,101,135,92,97,134,123,80,7,181,209,69,120,86,187,123,226,79,31,252,64,214,116,237,15,196,23,58,6,143,160,70,209,220,92,71,51,160,105,65,108,150,218,71,86,86,28,156,0,132,245,224,128,123,173,21,228,191,3,181,239,18,120,139,64,191,155,90,187,251,85,173,188,169,5,164,239,131,35,16,9,112,199,171,1,148,193,60,242,121,175,90,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,14,103,197,158,51,209,188,23,167,165,222,179,59,168,148,149,134,40,163,220,242,17,201,0,116,252,73,2,188,1,252,61,227,111,26,93,235,158,37,240,182,145,45,150,151,174,74,209,201,110,46,82,51,50,100,18,199,121,25,5,134,73,29,216,129,198,107,233,107,189,47,79,212,140,38,250,194,214,232,192,251,226,51,194,175,229,183,170,228,112,125,197,95,160,15,2,240,174,157,241,91,193,186,88,177,210,60,15,162,162,177,13,44,210,76,141,36,173,234,199,237,31,160,0,14,194,183,127,225,33,248,229,255,0,66,110,135,255,0,127,151,255,0,146,43,216,40,160,15,33,248,125,225,255,0,25,127,194,205,213,252,91,226,157,38,218,192,222,216,8,49,4,200,202,92,24,128,192,14,196,124,177,243,147,214,189,39,82,240,246,137,172,60,111,169,104,250,125,243,198,54,163,93,91,36,165,71,160,44,14,43,86,138,0,228,225,248,119,224,251,125,100,106,144,248,114,198,59,160,0,93,177,98,53,199,66,35,251,128,251,129,154,243,111,218,15,80,155,73,213,188,23,169,91,237,243,237,39,158,120,247,12,141,200,208,48,207,226,43,221,107,231,47,137,190,33,211,60,105,241,83,195,62,30,136,173,198,159,105,123,29,189,196,136,120,118,150,84,89,20,31,64,20,12,250,230,128,52,124,23,240,250,109,123,224,198,172,240,222,183,246,167,137,93,101,121,46,179,180,121,51,146,185,192,39,230,195,18,220,253,225,233,207,173,248,47,195,241,248,91,193,250,102,140,175,230,27,88,177,35,231,33,164,98,89,200,246,44,205,143,108,86,204,16,197,109,4,112,195,26,199,28,106,21,17,87,1,64,224,0,59,10,177,64,30,39,47,194,175,26,69,226,205,122,235,73,241,76,26,94,155,172,94,181,204,207,110,95,237,0,110,118,81,128,7,77,236,56,113,154,196,147,224,15,136,236,239,230,143,75,215,172,26,206,226,17,12,243,79,27,44,219,73,5,192,80,172,6,72,236,192,144,72,39,4,231,232,122,40,3,196,46,190,14,107,122,6,179,166,106,126,3,212,236,180,249,224,179,16,79,45,211,57,51,75,200,105,54,149,117,195,2,62,94,128,129,138,191,164,124,62,190,240,183,195,223,25,92,106,207,5,246,189,169,218,93,180,151,22,251,156,178,152,155,10,9,80,114,88,146,112,57,200,244,175,96,162,128,62,102,240,54,161,226,239,22,248,82,195,193,126,27,63,217,214,22,145,202,53,13,65,135,93,242,59,109,7,168,225,128,192,228,243,200,21,216,207,240,22,11,89,116,251,157,3,196,151,122,85,229,172,6,57,46,99,136,179,202,231,118,92,21,117,41,144,197,112,51,192,3,215,62,209,69,0,120,31,140,126,24,105,94,11,248,93,175,95,188,243,234,122,196,203,8,146,250,224,114,51,113,30,118,47,59,115,220,146,79,191,56,173,93,43,227,39,133,52,79,135,90,117,188,55,198,231,86,179,210,225,136,90,136,37,25,153,99,85,218,88,174,220,110,28,156,244,233,154,245,219,171,75,107,235,73,45,174,173,226,184,183,148,109,146,41,144,58,56,244,32,240,69,100,197,224,207,11,65,34,75,15,134,180,104,228,67,149,116,176,136,21,62,160,133,226,128,60,255,0,225,189,180,158,18,240,182,189,227,191,19,220,172,45,172,50,223,205,26,166,54,46,231,43,199,247,152,203,192,247,90,206,240,197,197,215,138,252,119,31,196,221,126,75,125,27,69,178,141,173,172,5,204,138,158,106,144,234,50,204,64,255,0,150,140,115,220,240,58,26,245,111,18,120,126,211,197,58,5,214,139,126,210,139,91,165,80,230,22,10,227,107,6,4,18,8,200,42,59,87,1,109,251,62,120,58,11,152,228,150,231,87,184,68,108,152,101,157,2,184,244,59,80,54,62,132,80,6,175,138,62,47,248,115,67,138,40,244,201,211,92,191,159,136,109,180,249,86,65,158,219,153,115,143,160,201,246,175,21,240,238,149,107,226,223,21,120,145,188,77,226,56,188,51,109,45,247,159,123,97,44,226,38,158,67,36,132,160,222,192,101,14,225,146,14,55,14,57,175,160,180,31,135,62,19,240,198,161,246,237,31,70,75,123,173,165,4,173,44,146,21,7,174,55,177,199,212,85,61,71,225,63,130,117,109,74,227,80,189,208,196,151,23,50,25,37,117,185,153,55,49,228,156,43,129,201,244,20,1,147,63,143,124,7,240,243,195,86,246,58,45,229,189,236,113,130,176,90,105,243,172,238,204,78,73,102,4,129,146,122,147,244,7,165,114,90,134,129,227,175,140,115,91,75,170,91,71,225,237,14,38,47,12,114,134,105,27,56,249,138,100,22,62,132,237,24,39,21,233,154,55,195,63,7,120,119,81,91,253,47,67,138,43,165,31,36,143,44,146,148,247,93,236,112,125,199,53,216,80,7,15,240,231,225,250,120,3,78,187,182,93,78,107,249,46,164,14,238,201,229,162,227,56,10,153,56,60,156,156,243,199,165,119,20,81,64,5,20,81,64,5,20,81,64,5,20,81,64,5,20,81,64,5,20,81,64,5,20,81,64,30,65,241,63,226,59,219,221,79,224,141,2,9,229,215,239,10,91,52,129,112,145,9,87,248,78,115,191,12,189,176,51,156,228,87,39,174,120,50,219,193,26,223,194,253,57,22,41,47,31,84,47,119,114,137,131,43,249,182,255,0,142,20,28,15,166,122,147,93,63,195,40,142,163,241,115,226,6,177,117,35,73,117,107,117,246,40,201,60,121,70,71,0,99,216,65,24,31,67,79,248,247,157,59,77,240,207,137,96,63,233,90,102,168,190,82,158,135,112,243,57,252,97,95,206,128,61,134,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,2,138,40,160,15,28,240,156,98,195,246,142,241,133,141,169,49,218,203,100,183,50,70,15,13,35,121,12,91,235,153,31,254,250,52,159,180,76,139,255,0,8,54,155,6,225,231,62,168,140,137,252,76,4,82,2,64,250,176,252,197,63,198,126,26,241,141,135,197,11,127,23,120,51,75,183,187,105,44,188,171,165,154,117,85,119,229,126,96,93,73,27,124,178,48,122,167,231,14,135,224,207,23,248,171,199,176,248,151,199,214,240,90,199,96,1,181,176,138,69,120,203,129,193,1,93,176,1,249,142,78,73,192,233,64,30,207,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,1,69,20,80,7,255,217]

var field = [65, 66, 67]
var result = String.fromCharCode.apply(null, field);
console.log(result);
Works. It get 'ABC' as a result.
What's the problem?

Related

I have a response which contains an array which is present inside string(""). What I need I just the array. How do I get rid of the quotes?
I tried JSON.parse(). It gave me error message
SyntaxError: Unexpected token ' in JSON at position 1
What I have is as follows:
email_id: "['abc#mail.com', 'cde#mail.com']"
What I need is as follows:
email_id: ['abc#mail.com', 'cde#mail.com']
This is a key which a part of a large response I am getting from backend in my angular 7 app.

Below solution will work for your case provided the strings does not contain /'
var a = "['abc#mail.com', 'cde#mail.com', 'def#mail.com']";
a = a.replace(/'/g, '"');
var result = JSON.parse(a);
Considering its an email data, there's no possibility of having that escape character sequence

You have to send in backend the format with double quotes instead of one quotes or in front just replace quotes ' with double quotes " inside your array , otherwise the parse will fail ,
see below snippet :
let json = {
email_id: "['abc#mail.com', 'cde#mail.com']"
}
json.email_id = json.email_id.replace(/'/g,"\"");
console.log(JSON.parse(json.email_id));

I'm trying to create a simple page that prompts the user for an input and checks a list to see if that input is included and will then return a true or false answer to the user. At the moment it is working fine and the code looks like this:
var barcodes = [
123425245,
62753264574,
1878769047,
00000000000001718075,
302,
303,
];
var entry=prompt("enter barcode");
var num1=parseInt(entry);
document.write(barcodes.includes(num1));
My problem is that I have over 2000 items to add to this array and I am trying to copy and paste them in from an excel spreadsheet. When I copy them in there is no comma separating each barcode and therefore i'm getting an error message. Is there a quick way to add commas at the end of each number in the array or do I have to do it manually?
Thanks for any help

As from Docs:
The split() method splits a String object into an array of strings by separating the string into substrings, using a specified separator string to determine where to make each split.
You can create an array using split() by splitting your data like this:
let str = "123425245 62753264574 1878769047 00000000000001718075 302 303";
let barcodes = str.split(" ").map(Number);
console.log(barcodes);

var barcodes = [
123425245,
62753264574,
1878769047,
00000000000001718075,
302,
303,
];
var temp = barcodes.join(",");
console.log(temp)

I use JSON to send data to websocket. Sometimes websocket recive many messages as one, and event.data looks like:
{"message1":"message1"}{"message2":"message2"}
so i can't parse it with JSON.Parse. How to handle this problem?

Here's an example of an auto-recovering JSON parser, which you can use to parse concatenated jsons:
function *multiJson(str) {
while (str) {
try {
yield JSON.parse(str);
str = '';
} catch(e) {
var m = String(e).match(/position\s+(\d+)/);
yield JSON.parse(str.slice(0, m[1]));
str = str.slice(m[1]);
}
}
}
//
let test = '{"message1":"message1"}{"message2":{"nested":"hi}{there"}}"third"[4,5,6]';
for (let x of multiJson(test))
console.log(x)
Basically, if there's a syntax error at position n, it tries to parse out everything before n and what's after it.

If you cannot fix it on the sending side and it always looks like this, then you might try to fix it and replace '}{' with '}\n{', split on newlines and have an array of JSON strings.
var array = input.replace('}{', '}\n{').split('\n');
Note that if your input contains newlines then you have to use another character or string:
var array = input.replace('}{', '}==XXX=={').split('==XXX==');
but it relies on fact that you don't have '}{' anywhere else in the string, which may not be true.
A more correct way, but harder, would be to count { and } that are not inside of strings, and when you get the same number of } as the number of { then split the string there.
What you would have to do is go character by character and keep track of whether you are inside quotes or not, make every { increment a counter, } decrement a counter and split your input whenever your counter hits zero.
Another hacky way would be to try to split the string on every possible } and try to parse the substring as JSON and if it's valid then use it and remove from the input.

If you have any control over the API then I would strongly recommend that you have it fixed there. However if you don't the please proceed reading.
I assume that looking for "}" is not really an option since you could have nested objects and the } character might be inside a string and so on.
A quick and easy way would be to try parse the string starting with 1 character and adding characters one by one until the JSON parser does not fail. That is when you will have your first chunk of data parsed.
Move the offset to the end of the successfully parsed data and repeat.
Might not be an elegant solution or very efficient one but then again you have a non standard data format.

I am running into an odd little problem with parsing some JSON which has quotes in it. I am using the native JSON.stringify and JSON.parse functions to do this. If I stringify an object which an object which has quote marks in it, they are escaped as one would expect. If I then parse this back into an object, it again works fine.
The problem is occurring where I stringify, then print the object to a page, then parse the resulting string. If I try to do this, the parse function fails as stringify has only put single slashes before each of the offending quote marks.
The reason I need to achieve this is I am working on an application that dynamically loads content stored in a database as JSON strings. The strings at some point need to be printed onto the page somewhere so that the javascript can find them and build the page based on their contents. I need some way of robustly passing the object into and out of strings which will not fail if a user inputs the wrong characters!
I can solve this for the moment by inserting extra slashes into the code with a replace call, but I was wondering if there is a better way to handle this?
I have put together a couple of jsfiddles to illustrate what I am trying to describe:
http://jsfiddle.net/qwUAJ/ (Stringify then parse back)
var ob = {};
ob["number1"] = 'Number "1"';
ob["number2"] = 'Number 2';
ob["number3"] = 'Number 3';
var string = JSON.stringify(ob);
var reOb = JSON.parse('{"number1":"Number \"1\"","number2":"Number 2","number3":"Number 3"}');
$('div').html(string);
http://jsfiddle.net/a3gBf/4/ (Stringify, then print, then parse back)
// Make an object
var ob = {};
ob["number1"] = 'Number "1"';
ob["number2"] = 'Number 2';
ob["number3"] = 'Number 3';
// Turn the object into a JSON string
var string = JSON.stringify(ob);
// Printing the string outputs
// {"number1":"Number \"1\"","number2":"Number 2","number3":"Number 3"}
$('.stringified').html(string);
// Attempt to turn the printed string back into an object
var reOb = JSON.parse('{"number1":"Number \"1\"","number2":"Number 2","number3":"Number 3"}');
// This fails due to the single escaped quote marks.
Thank you for any help in advance!

This is a problem which arises from re-evaluating a String without first converting it back into a string literal, so the meaning changes if it is even still valid.
You need to consider what does '\"' as a literal actually mean? The answer is ", without the \. Why?
\" resolves to "
If you want to have \" as the result of the literal, you need to write '\\\"'
\\ resolves to \
\" resolves to "
So basically, the extra slashes are required to escape any characters with special meaning in string literals.
If you did var reOb = JSON.parse($('.stringified').html()); it would work fine as is.
Consider further
str = '\\\"\\\''; // \"\'
str = '\"\''; // "'
str = '"''; // SyntaxError: Unexpected token ILLEGAL
As far as I'm aware, JavaScript offers no native implementation to convert strings as desired, so the easiest method I know of is using a replace
function toLiteral(str) {
var dict = {'\b': 'b', '\t': 't', '\n': 'n', '\v': 'v', '\f': 'f', '\r': 'r'};
return str.replace(/([\\'"\b\t\n\v\f\r])/g, function ($0, $1) {
return '\\' + (dict[$1] || $1);
});
}
toLiteral('foo\\bar'); // "foo\\bar"

If you generate JS with PHP code you should escape the quotes in your JSON string:
//PHP code generating js code
echo "var myJSONString = \"". str_replace("\"","\\\"",$mySqlJSON)."\";";

I got
[[["汽車","car","Qìchē",""]],[["名詞",["汽車","車","轎車","車輛","車廂"],[["汽車",["car","automobile","auto"],,0.26497361],["車",["car","vehicle","lathe","machine","rook","turn"],,0.21967085],["轎車",["car","bus"],,0.020115795],["車輛",["vehicle","car"],,0.013611027],["車廂",["car"],,0.0042828997]]]],"en",,[["汽車",[4],0,0,1000,0,1,0]],[["car",4,[["汽車",1000,0,0],["車",0,0,0],["轎車",0,0,0],["車輛",0,0,0],["車廂",0,0,0]],[[0,3]],"car"]],,,[["en"]],27]
this from google translator
However I tried
JSON.parse(xhr.responseText);
It return an error Unexpected token

The problem is that this string contains multiple commas making your json invalid.
You could try to replace it for a single one before parsing
var x = '[[["汽車","car","Qìchē",""]],[["名詞",["汽車","車","轎車","車輛","車廂"],[["汽車",["car","automobile","auto"],,0.26497361],["車",["car","vehicle","lathe","machine","rook","turn"],,0.21967085],["轎車",["car","bus"],,0.020115795],["車輛",["vehicle","car"],,0.013611027],["車廂",["car"],,0.0042828997]]]],"en",,[["汽車",[4],0,0,1000,0,1,0]],[["car",4,[["汽車",1000,0,0],["車",0,0,0],["轎車",0,0,0],["車輛",0,0,0],["車廂",0,0,0]],[[0,3]],"car"]],,,[["en"]],27]'
.replace(/,{2,}/g, ",") // 2 or more replace for 1
JSON.parse(x);
Or if you have access to whatever is sending this string fix the output.

First you should remove an extra [] brackets by replacing that.
ex,
[["汽車","car","Qìchē",""]]
should be:
["汽車","car","Qìchē",""]
EDIT: you can refer to this answer: Parse Google Translate Json C#
You should try:
var str = '[[["汽車","car","Qìchē",""]],[["名詞",["汽車","車","轎車","車輛","車廂"],[["汽車",["car","automobile","auto"],,0.26497361],["車",["car","vehicle","lathe","machine","rook","turn"],,0.21967085],["轎車",["car","bus"],,0.020115795],["車輛",["vehicle","car"],,0.013611027],["車廂",["car"],,0.0042828997]]]],"en",,[["汽車",[4],0,0,1000,0,1,0]],[["car",4,[["汽車",1000,0,0],["車",0,0,0],["轎車",0,0,0],["車輛",0,0,0],["車廂",0,0,0]],[[0,3]],"car"]],,,[["en"]],27]';
var objstr = $.parseJSON(str);