Whats the best way to parse a stringified array in javascript? [duplicate] - javascript

This question already has answers here:
Safely turning a JSON string into an object
(28 answers)
Closed 3 years ago.
For example: '[test,abc,123]'. How do you turn that into a standard javascript array that can be iterated?


This will work, but really you should fix your input to give you real JSON as is noted in the comments.
console.log(JSON.parse('["test","abc",123]'));

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For Loop In JavaScript Table [duplicate]

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I'm trying to do a for in in an obj Json array looking for a variable, specify the following example. Thank you very much in advance.
I want to consult which division a certain team is in "Vasco".
I wanted to understand what better way.
{"table":{"1° Division":["Flamengo","Goiás","Palmeiras"], "2° Division": ["Real","Barc","Madri"], "3°Division": ["Vasco","Itunbi","Recife"]}}

if you treat the json as an array it should come easy for you.
after that you can use a shorting algorithm

Is there a better alternative to slice? [duplicate]

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Parse query string in JavaScript [duplicate]
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How can I get query string values in JavaScript?
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Closed 9 months ago.
I'm kind of new to javascript and I was wondering if there was a better alternative to slice. I'm currently using window.location.slice at the moment and it feels like I could be using a better alternative. If you've ever used express.js you might have heard of "req.query.id", something like that in raw javascript would be perfect. Thanks, Alek.

Are class and array really just an Object in JavaScript? [duplicate]

This question already has answers here:
How can I check if an object is an array? [duplicate]
(51 answers)
Closed 6 years ago.
If so, how can I detect the difference between them.
I've noticed that you can't do typeof Array hence I'm looking for different solution to see the difference.

You can detect if a variable is an array by using Array.isArray(yourArray).

Convert Math object to real object [duplicate]

This question already has answers here:
How can I list all the properties of Math object?
(3 answers)
Closed 8 years ago.
Is there a nice way to convert Math object into "real" javascript object?
I want to use Object.keys on Math object. Is that possible to not hardcode it all the way down?

The properties of Math are not enumerable, so Object.keys(Math) returns an empty array.
However, you can use
Object.getOwnPropertyNames(Math)
It will produce something like
["toSource","abs","acos","asin","atan","atan2","ceil","clz32","cos","exp","floor","imul","fround","log","max","min","pow","random","round","sin","sqrt","tan","log10","log2","log1p","expm1","cosh","sinh","tanh","acosh","asinh","atanh","hypot","trunc","sign","cbrt","E","LOG2E","LOG10E","LN2","LN10","PI","SQRT2","SQRT1_2"]

Validate json schema in php [duplicate]

This question already has answers here:
Fastest way to check if a string is JSON in PHP?
(36 answers)
Closed 8 years ago.
I have following json pattern
{"property":[{"id":"1","name":"Property 1"},{"id":"2","name":"Property 2"}]}
How can i validate json schema? Thanks in advance.

Use json_decode($string); to convert the JSON string into native PHP. If NULL is returned the string cannot be decoded. You can then use json_last_error() to get the error code, which may be helpful.
http://www.php.net/manual/en/function.json-decode.php
http://www.php.net/manual/en/function.json-last-error.php

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