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pietro909/runtime-error-typescript.ts

Last active October 28, 2016 08:33
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A runtime error in Typescript
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runtime-error-typescript.ts
function contains(c: string, arr: string) {
var index = arr.indexOf(c);
return index > -1;
}
console.clear();
console.log(contains("hi", "there")); // false
console.log(contains("hi", "hi, all")); // true
console.log(contains("hi", 1)); // doesn't compile
console.log(contains("hi", null)); // TypeError: Cannot read property 'indexOf' of null
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