34 lines
750 B
Markdown
34 lines
750 B
Markdown
importance: 5
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---
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# Partial application for login
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The task is a little more complex variant of <info:task/question-use-bind>.
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The `user` object was modified. Now instead of two functions `loginOk/loginFail`, it has a single function `user.login(true/false)`.
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What to pass `askPassword` in the code below, so that it calls `user.login(true)` as `ok` and `user.login(fail)` as `fail`?
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```js
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function askPassword(ok, fail) {
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let password = prompt("Password?", '');
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if (password == "rockstar") ok();
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else fail();
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}
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let user = {
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name: 'John',
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login(result) {
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alert( this.name + (result ? ' logged in' : ' failed to log in') );
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}
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};
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*!*
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askPassword(?, ?); // ?
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*/!*
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```
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Your changes should only modify the highlighted fragment.
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