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I am converting hex to hex strings then came across 2 ways to do it using the toString() method:
toString('hex')
toString(16)
I see a lot of resources online also use toString('hex') but when I tried to use it, it gives out an error message: RangeError: toString() radix argument must be between 2 and 36.
The toString(16) works perfect.
But just for curiousity, what is the story behind this? Is the toString('hex') deprecated of some sort? Or is there any specific use-case when that is used instead of toString(16)
Example:
let num = 0x7
console.log('Convert using toSting(hex): ' + num.toString('hex')) // throws an error
console.log('Convert using toSting(16): ' + num.toString(16))
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How to craete a interface in typescript for an array such that every odd memmber is a number and every even member is a string.
I know tuple like [number,string] but it limits the number of element in array .
Also using union(|) will result into anyone can be number or string (number|string)[].
I need something that work for [1,'aa',2,'bb'].
I need a interface that can work with [1,'ajay',2,'abcd',3,'defg']
with any number of items in array.
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I am trying on the Google console.
new Date('1611065280155').getDate() which returns NaN and I was expecting 'yyyy/mm/dd' similar format.
How do I get the date from a milliseconds?
I was referring to https://www.codegrepper.com/code-examples/delphi/get+the+date+in+different+format+javascript but since there are many functions and got confused
You could use Date with a number as value for handing over epoch time.
console.log(new Date(1611065280155));
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I'm currently creating directories with a variable called currentDate.
I am trying to create the following directory:
business/bookings/15/06/2020 //3 levels down. the date is a level.
with business/bookings/currentDate
However, JavaScript and Firebase will interpret the '/' as another directory.
How could I solve this problem given that I'll get a variable that's always formatted this way?
A very simple substitution would be with escape/unescape, but nowadays I'd probably use encodeURIComponent/decodeURIComponent:
encodeURIComponent("business/bookings/currentDate")
"business%2Fbookings%2FcurrentDate"
decodeURIComponent("business%2Fbookings%2FcurrentDate")
"business/bookings/currentDate"
Short version: you can't.
The / character is not admitted in file (and directories) name. What you can do is to substitute the slash character with something else.
Hope this helps.
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I started learning JavaScript, and I have faced this problem with strings.
the problem is
and the result is
Why are the results different?
`` - this is 'backtick' - when you use those characters, this is template string. This syntax allows you, to use for example, multiline strings or nested js variables ${}.
'' or "" - this is standard js syntax for strings, you cannot use here ${}
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I was ask a question in an interview to convert a string number to a number.
eg : My string is "TEN" . and I have to convert it to number 10.
Please help.
Thanks
if (string === "TEN") value = 10;
I think you misunderstood the interviewer's question. He meant getting the number that is currently in a string, not getting the number that is currently spelled out in a string.
But this has already been answered: https://stackoverflow.com/a/4090577/2725684