So I want to create a function to get the weekdays in a specified month of year, I can already do this but when I get up to the part where I actually list them on the calendar it seems to start from 0 and go to 30 and not 1 to 31 how it should be for December? Here
Tag: numbers
Can I safely use the Number type in javascript for calculations with 2 decimal places?
I know that certain numbers will get slight variations from their original value. Eg. 0.1 + 0.2 -> 0.30000000000000004. But if I do Math.round(0.30000000000000004 * 100) / 100, I will get the correct answer -> 0.3. I ran a Javascript test and found that the results will accurate at least up to 1e+10. Are there any caveats to doing this?
I need to write difficult palindrome
That’s my example. String are given. Implement a function – detectPalindrom, that can detect palindrome string. Given argument not an string – return ‘Passed argument is not a string’. Given string is empty – return ‘String is empty’. Given string palindrome – return ‘This string is palindrome!’. Given string is not a palindrome – return ‘This string is not a
React: How to prevent user from entering ‘e’, ‘+’ and ‘-‘ for input type=”number”
I have an input and can filter any letter if the input type is ‘text’. Also, I’m listening to an onKeyUp event to increment/decrement the input value. But there are 2 issues with this approach: The text input does not show up/down buttons on the right side. When the user presses the ‘ArrowUp’ button, the cursor ‘jumps’ back and forth
How to output numbers with leading zeros in JavaScript? (satoshi format)
Is there a way to prepend leading zeros and a dot to numbers so that it results in a string of fixed length? For example: 1 becomes “0.00000001 BTC”. 498 becomes “0.00000498 BTC”. Answer use / to divide, then toFixed(). For example: You can put it in a function: And use it with your examples:
Extract Numbers from Array mixed with strings – Javascript
I have an array from strings and numbers. I need to sort the numbers or better to extract only the numbers in another array. Here is the example: I need to make it like this I used split(‘ ‘) method to separate them with comma but don’t know how to filter them for JS they all are strings. Answer This
Mapping Array in Javascript with sequential numbers
The following code: Creates the following Array: I just don’t understand why. I can’t find anything on the internet that explains this behavior. Does anyone know why this works the way it does? Perhaps a link to some documentation? Answer creates an array of length 10 with all elements being undefined. will invoke Number.call for each element with the arguments
Convert number to alphabet letter
I want to convert a number to its corresponding alphabet letter. For example: Can this be done in javascript without manually creating the array? In php there is a range() function that creates the array automatically. Anything similar in javascript? Answer Yes, with Number#toString(36) and an adjustment.
HTML input type=”number” still returning a string when accessed from javascript
I’m new to javascript , I’m trying learning how functions etc in JS and trying to add 2 numbers If I remove the parseInt() the value is treated as a string only , then what is the point of using <input type=”number”> ?please explain to me. what field to use for getting input as a number? Answer It’s normal you
parseInt() parses number literals with exponent incorrectly
I have just observed that the parseInt function doesn’t take care about the decimals in case of integers (numbers containing the e character). Let’s take an example: -3.67394039744206e-15 I expected that the parseInt will also return 0. What’s going on at lower level? Why does parseInt return 3 in this case (some snippets from the source code would be appreciated)?