javascript-calc | calculator developed with js/html/css | Apps library

by 0xAndre JavaScript Version: Current License: No License

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kandi X-RAY | javascript-calc Summary

javascript-calc is a JavaScript library typically used in Apps, jQuery applications. javascript-calc has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

calculator developed with js/html/css

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Support

javascript-calc has a low active ecosystem.

It has 18 star(s) with 11 fork(s). There are 3 watchers for this library.

It had no major release in the last 6 months.

javascript-calc has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of javascript-calc is current.

Quality

javascript-calc has no bugs reported.

Security

javascript-calc has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

javascript-calc does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

javascript-calc releases are not available. You will need to build from source code and install.

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javascript-calc Key Features

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javascript-calc Examples and Code Snippets

No Code Snippets are available at this moment for javascript-calc.

Community Discussions

Trending Discussions on javascript-calc

The approach for reducing the complexity of conditional statements

JavaScript calculator - Unable to understand few lines in code

React: Javascript Calculator: How to return a function from a switch statement?

React: How to correct `array.push is not a function` error that only occurs after attempting to clear state?

React: How to totally and completely clear state

React: How to force setState()?

React: How to clear text in an element?

How to Get the Result Using Javascript

How do I put a keyPress handler that can be used without having the button on focus?

Same calculation returns NaN from inside object BUT returns integer from a function doing the same calculation

QUESTION

The approach for reducing the complexity of conditional statements

Asked 2021-Jun-09 at 07:39

There is one project challenge on freecodecamp about building a calculator and I just managed to pass all the tests but when looking back on my code, the section dealing with the operations are barely readable. I've read some articles online regarding how to reduce the complexity of conditionals and the principles to keep in mind for more easy-to-understand logic.

However, figuring out the achievable logics for this task in javascript is quite challenging to me now. I was trying to meet two conditions with this section of code as follows:

User Story #13: If 2 or more operators are entered consecutively, the operation performed should be the last operator entered (excluding the negative (-) sign). For example, if 5 + * 7 = is entered, the result should be 35 (i.e. 5 * 7); if 5 * - 5 = is entered, the result should be -25 (i.e. 5 * (-5)).

User Story #14: Pressing an operator immediately following = should start a new calculation that operates on the result of the previous evaluation.

Here is the link to the page for this particular challenge and this is the link to the code I wrote by far.

Is there any tips and advice on refining the code or other approaches for coping with this part?

...

ANSWER

Answered 2021-Jun-09 at 07:39

Break down the process to the basic steps:

get the operation(s) from the string
get the numbers from the string
do the operation

Here's a snippet for this:

Source https://stackoverflow.com/questions/67897105

QUESTION

JavaScript calculator - Unable to understand few lines in code

Asked 2021-May-25 at 16:42

I am a beginner in coding and while following YouTube channel WebDevSimplified, I came across below JS code for making a calculator. In the below code, I am not able to understand, how currentOperand and previousOperand are being used without defining? It looks like currentOperand is referencing to currentOperandTextElement and previousOperand to previousOperandTextElement, However its not defined anywhere in code. below is the link for GitHub repo

https://github.com/WebDevSimplified/Vanilla-JavaScript-Calculator/blob/master/script.js

Request you all to help me understand. Thank you so much.

...

ANSWER

Answered 2021-May-25 at 16:42

currentOperand and previousOperand are dynamically being created as fields on the class Calculator. Since both of them were not defined in the constructor, their initial value is undefined.

For example, as operations are performed on the calculator by appendNumber, this.currentOperand is assigned a value, which can be used later by chooseOperation() and compute().

Source https://stackoverflow.com/questions/67692176

QUESTION

React: Javascript Calculator: How to return a function from a switch statement?

Asked 2020-Sep-21 at 21:15

In a Javascript Calculator being built with React, there is a switch statement that is intended to return a function. It appears that switch statements are allowed to return if they are in a function. However, there is an error when returning the function from the switch statement: TypeError: func is not a function.

Any help would be greatly appreciated.

index.js

...

ANSWER

Answered 2020-Sep-19 at 00:41

You try to use an operator for every number in the input text. But usually there will be more numbers than operators, so this will fail for the last number that doesn't have an operator associated.

The returnFunc function will then be called with undefined because the operators array is empty. And will in this case also return undefined instead of a function.

You start with answer = 0 and then do the first operation. Instead, start with answer being the first number and then do the first operation with the second number and so forth

Source https://stackoverflow.com/questions/63963963

QUESTION

React: How to correct `array.push is not a function` error that only occurs after attempting to clear state?

Asked 2020-Sep-21 at 17:39

In this React Javascript Calculator, there is a function that pushes operators onto an array so that the length of the array can be used to limit the number of decimal points allowed in a number to one decimal point per operator. An operator can immediately be entered successfully after a browser reset, but not after the clear button is clicked. Any help would be greatly appreciated.

index.js

...

ANSWER

Answered 2020-Sep-21 at 17:35

When you run your clear function,

Source https://stackoverflow.com/questions/63997272

QUESTION

React: How to totally and completely clear state

Asked 2020-Sep-21 at 17:25

In this React Javascript Calculator, decimal points are able to be added to numbers, but only after a complete browser refresh, and not after clicking the clear button which triggers the clear() function. How can state be completely and totally reset in the clear() function so that state becomes as if a browser refresh had been done. Any help would be greatly appreciated.

index.js

...

ANSWER

Answered 2020-Sep-21 at 04:31

Try to create a variable copy your init state then replace it when you want to clear, like bellow example

Source https://stackoverflow.com/questions/63986025

QUESTION

React: How to force setState()?

Asked 2020-Sep-21 at 00:41

In this React Javascript Calculator this.setState({ array: displayed}); is supposed to update the array in state, but it doesn't. Is there a way to force it? Any help would be greatly appreciated.

index.js

...

ANSWER

Answered 2020-Sep-21 at 00:41

setState is async. It won't work how you're using it. In your case, you should just pass the displayed array to the calculate function.

Source https://stackoverflow.com/questions/63984738

QUESTION

React: How to clear text in an element?

Asked 2020-Sep-17 at 23:31

There is a

that contains text which should be cleared when pressing a named "clear". However, there is an error when it is pressed: TypeError: null is not an object (evaluating 'document.getElementById(id).innerHTML = "0"')

All the buttons using this.display(e.target.id) work. Only the "clear" button which uses this.clear('display') doesn't work.

Any help would be greatly appreciated.

index.js:

...

ANSWER

Answered 2020-Sep-17 at 18:27

You could use state for the numbers x and y.

And then have a function to reset by just setting x and y to 0.

Source https://stackoverflow.com/questions/63944092

QUESTION

How to Get the Result Using Javascript

Asked 2020-Jul-18 at 01:20

I am working with this code and would like to get the result inside intTotal. But it doesn't give me the result I wish.

...

ANSWER

Answered 2020-Jul-18 at 01:13

Since intTotal is a div, you want to use innerHTML not value. value in the post you linked to is for an input control, not a div

Source https://stackoverflow.com/questions/62963606

QUESTION

How do I put a keyPress handler that can be used without having the button on focus?

Asked 2020-Jun-11 at 19:21

I'm doing a ReactJS calculator, and I want to be able to click the numbers on my keyboard and that showing on my calculator. I wrote the following handler:

...

ANSWER

Answered 2020-Jun-11 at 19:14

Assuming the calculator is the only thing in the page, the easiest way to solve this is to put the handler for keyPress on the div that covers the whole page. You'll have to refactor some of your other code to get it to work however.

Source https://stackoverflow.com/questions/62331643

QUESTION

Same calculation returns NaN from inside object BUT returns integer from a function doing the same calculation

Asked 2020-Apr-13 at 22:56

For the life of me, I cannot figure why the same calculation return two different data type between:

Calculating from inside the object definition AND
Outside in hand-made function

I have already looked at: JavaScript calculation returns NaN & JavaScript: function returning NAN

and I am still baffled. Please HELP.

Here is my code and it's run:

...

ANSWER

Answered 2020-Apr-13 at 22:56

If you don't use getter, this won't be refer to the object. And this.question1 and this.question2 are undefined, that's why your answer_inside get NaN.

Source https://stackoverflow.com/questions/61197961

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

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Install javascript-calc

You can download it from GitHub.

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