Q2061. What will happen by defining nested function components?
Technically it is possible to write nested function components but it is not suggested to write nested function definitions. Because it leads to unexpected bugs and perfo...
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Q2062. How would you convert a string into lowercase?
We use the lower() method for this. ```python >>> 'AyuShi'.lower() ``` 'ayushi' To convert it into uppercase, then, we use upper(). ```python >>> 'AyuShi'.upper() ``` 'AY...
Q2063. How do you get the prototype of an object?
You can use the `Object.getPrototypeOf(obj)` method to return the prototype of the specified object. i.e. The value of the internal `prototype` property. If there are no ...
Q2064. Can I use keys for non-list items?
Keys are primarily used for rendering list items but they are not just for list items. You can also use them React to distinguish components. By default, React uses order...
Q2065. What is the pass statement in Python?
There may be times in our code when we haven't decided what to do yet, but we must type something for it to be syntactically correct. In such a case, we use the pass stat...
Q2066. What happens If I pass string type for getPrototype method?
In ES5, it will throw a TypeError exception if the obj parameter isn't an object. Whereas in ES2015, the parameter will be coerced to an `Object`. ```javascript // ES5 Ob...
Q2067. What are the guidelines to be followed for writing reducers?
There are two guidelines to be taken care while writing reducers in your code. 1. Reducers must be pure without mutating the state. That means, same input always returns ...
Q2068. Explain help() and dir() functions in Python?
The help() function displays the documentation string and help for its argument. ```python >>> import copy ``` >>> help(copy.copy) Help on function copy in module copy: c...
Q2069. How do you set the prototype of one object to another?
You can use the `Object.setPrototypeOf()` method that sets the prototype (i.e., the internal `Prototype` property) of a specified object to another object or null. For ex...
Q2070. How does ReactJS work behind the scenes?
ReactJS is a powerful JavaScript library for building user interfaces. While it appears simple on the surface, React performs a lot of complex operations behind the scene...