Padding Partial String
If we want to pad the partial string, we can’t simply use padStart() to get the result.
タグ : ECMAScript
Substring to Specific Character
If we want to substring to a specific character, we can’t just use substring() to get the result.
Destructuring the Function Parameter
Sometimes we may get an Object with an Array on the parameter. We can use Object and Array destructuring together for the function parameter.
Finding Value with Recursive Object
Sometimes we may get data by the data structure of a Recursive Object. We have to write some recursive functions to find value with these Recursive Objects.
How to Convert Object into Query String ?
If data is an Object, we can use Object.entries, map and join to convert Object into Query String.
Extracting Floating-Point Number to N Digits
As for extracting Floating-point Number to finite digit, we can use parseInt or toFixed.
4 Ways to Convert from Number to String
We can convert from Number to String by String, toString, Type Coercion or Template String.
4 Ways to Convert from String to Number
We can convert from String to Number by Number, parseInt, + or ~~ operator.
Why Number Literal has Instance Methods ?
We often use Number Literal in Practical, not Wrapper Object of Number. We can call instance method directly on Number Literal. But why?
Using Primitive Wrapper Object to Wrap Number
In addition to using Primitive for Number, we can use Primitive Wrapper Object to wrap Number.