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January 12, 2017 20:38
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try\catch for JSON.parse
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const loadDataOrDefault = <T>(response: any, defInstance?: T) => { | |
try { | |
return JSON.parse(response); | |
} catch(e) { | |
return defInstance ? defInstance : null; | |
} | |
}; | |
class Person { | |
constructor(public name: string = "Default", public age: number = 100) {} | |
} | |
let data1 = loadDataOrDefault('undefined'); | |
let data2 = loadDataOrDefault<Number>('undefined', 20); | |
let data3 = loadDataOrDefault<Person>('undefined', new Person()); | |
console.log(data1); | |
console.log(data2); | |
console.log(data3); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
const loadDataOrDefault = (response: any, DefaultType?: any) => { | |
try { | |
return JSON.parse(response); | |
} catch(e) { | |
return DefaultType && typeof DefaultType == "function" ? new DefaultType() : null; | |
} | |
}; | |
class Person { | |
constructor(public name: string = "Default", public age: number = 100) {} | |
} | |
let data1 = loadDataOrDefault('undefined'); | |
let data2 = loadDataOrDefault('undefined', 20); | |
let data3 = loadDataOrDefault('undefined', null); | |
let data4 = loadDataOrDefault('undefined', Person); | |
console.log(data1); | |
console.log(data2); | |
console.log(data3); | |
console.log(data4); |
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