How do i convert hex values to their decimal value using nodejs ?
Suppose i have hex value as bellow
9c63e8e2f6574c197c0626bad843eb47104adf3f01f2901aad1258936feb007e
Any one have any idea the please let me know
JS parseInt function takes base as a second argument.
So you can simply use parseInt(hexString, 16).
For example: parseInt('ff', 16) will return 255.
Related
what is the simplest way to print the result as follows using pyhton3
I have a Hex string s="FFFC"
In python if using this command line: print(int(s,16))
The result I'm expecting is -4 (which is in signed format). But this is not the case, It displays the Unsigned format which the result is 65,532.
How can I convert this the easiest way?
Thank you in advance.
There are several ways, but you could just do the math explicitly (assuming s has no more than 4 characters, otherwise use s[-4:]):
i = int(s, 16)
if i >= 0x8000:
i -= 0x10000
You can use the bytes.fromhex and int.from_bytes class methods.
s = bytes.fromhex('FFFC')
i = int.from_bytes(s, 'big', signed=True)
print(i)
Pretty self-explanatory, the only thing that might need clarification is the 'big' argument, but that just means that the byte array s has the most significant byte first.
I have this:
function dec2hex(IN)
local OUT
OUT = string.format("%x",IN)
return OUT
end
and need IN to have padded zeros to string length of 6.
I can't use String.Utils or PadLeft. It's within an app called Watchmaker which uses a cut down version of Lua.
String formats in Lua work mostly just like in C. So to pad a number with zeros, just use %0n where n is the number of places. For example
print(string.format("%06x", 16^4-1))
will print 00ffff.
See chapter 20 The String Library of “Programming in Lua”, the reference of string.format, and the C reference for the printf family of functions for details.
If you store your format string locally you can call the format method on to the format string and the example of #Henri results in ("%06x"):format(0xffff)
print(("%06x"):format(0xffff)) -- Prints `00ffff`
You can write numbers in hex format. It is the same as C.
I have this hexadecimal in a nodejs Tcp Client
82380000000000000400000000000000
I have used parseint function to convert it to
1.73090408076117e+38
But i need to get its binary representation that is
10000010001110000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000
Ho can i get this binary representation from the above hexadecimal format?
Using the toString specifying the base as the parameter should make it. For example, if you want to convert it to a binary string, after parsing it to an integer:
var number = '82380000000000000400000000000000';
console.log(parseInt(number).toString(2));
In case you want an hexadecimal string, just use .toString(16);
If you don't want to parse the string with the number:
var number = 82380000000000000400000000000000;
console.log(number.toString(2));
Hope this helps.
That may sound like a weird struggle and actually easy to do, but I cannot find a working way to convert an hexidecimal in a string format into a float.
My exemple is for instance: 406ea716
If I convert it using one of the following website, I get 3.728948.
http://www.h-schmidt.net/FloatConverter/IEEE754.html
http://gregstoll.dyndns.org/~gregstoll/floattohex/
I tried every single piece of code I found on the internet, but it won't return the same result.
Does it exist a module in NodeJS to perform the same conversion? If not, what can I do?
Thank you for your help.
I had the same issue. try this.
Buffer('406ea716','hex').readFloatBE(0)
3.7289481163024902
No need for a module:
var hex = '406ea716';
// transform the hexadecimal representation in a proper js hexadecimal representation by prepending `0x` to the string
// parseInt() - because your example was an integer.
var num = parseInt( '0x' + '406ea716');
console.log( num );
Have you tried parseInt?
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt
$ node
> parseInt('406ea716', 16)
1080993558
I have a line like this:
pad (2) = 0x0041
I wanna change the hex into decimal and the expected result is
pad (2) = 65
I just tried :%s/\(.*\) = \(.*\)/\1 = \=printf("%d", submatch(2)), but it failed.
Would you help to solve this?
Vim has a str2nr() function to convert different number representations to their decimal values. To convert hex values you could use it like this:
s/0x[0-9a-fA-F]\+/\=str2nr(submatch(0), 16)
Your code is almost ok, but, according to the documentation:
When the substitute string starts with "\=" the remainder is interpreted as an
expression. This does not work recursively: a substitute() function inside
the expression cannot use "\=" for the substitute string.
So, you may change your code to
%s/\(.*\) = \(.*\)/\=submatch(1)." = ".printf("%d", submatch(2))