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angularvalidationtypescript
Akshay
Akshay

Reputation: 137

Convert string to object in typescript?

I am trying to validate a glob expression using Is-Valid-Glob which accepts string and array. The value which needs to be validated is received from a text field. The problem is that if we pass an invalid glob expression it produces the wrong result as every input is received as a string. For example:- If user inputs [] (invalid glob) its gets assigned to model variable as string '[]' and validation is done on '[]' instead of [] value. Is there a way by which we convert the value from string variable to object variable (only the value should not get type) and do validation?

PS: I am using Angular 2.

Upvotes: 5

Views: 33234

Answers (3)

Sanjeeta
Sanjeeta

Reputation: 1

We can use Object.assign({},object) to convert string into object.

Upvotes: -2

Vikramjit Roy
Vikramjit Roy

Reputation: 484

You can use JSON.parse to convert from string to objects: 

     var x = require('is-valid-glob');
     var y = '[]';//'foo/*.js' any user provided string
     // this will check if the user has provided an array object if so it 
     //will do a json.parse to remove the '' and then verify the string for a glob.
     x(y[1] !== '['?y:JSON.parse(y));

Upvotes: 6

Deepak Jha
Deepak Jha

Reputation: 1609

Try with eval it is used to convert string into equivalent object for an example,

var a="[]";
console.log(a);// this will print "[]" as a string.
console.log(eval(a));// this will print an array object. With 0 length array object.

Upvotes: 3

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