Convert string (in scientific notation) to float
The float function can do this: >>> float(‘1.31E+01’) 13.1 or for a list: >>> map(float, [‘3.76E+00’, ‘1.31E+01’, ‘1.14E+01’]) [3.76, 13.1, 11.4]
data-conversion
convert C# date time to string and back
You should use the roundtrip format specifier “O” or “o” if you want to preserve the value of the DateTime. The “O” or “o” standard format specifier represents a custom date and time format string using a pattern that preserves time zone information. For DateTime values, this format specifier is designed to preserve date and … Read more
How can I convert an integer to float with rounding towards zero?
Since C++11, one can use fesetround(), the floating-point environment rounding direction manager. There are four standard rounding directions and an implementation is permitted to add additional rounding directions. #include <cfenv> // for fesetround() and FE_* macros #include <iostream> // for cout and endl #include <iomanip> // for setprecision() #pragma STDC FENV_ACCESS ON int main(){ int … Read more
How do I convert a Char to Int?
That’s because num is a Char, i.e. the resulting values are the ascii value of that char. This will do the trick: val txt = “82389235” val numbers = txt.map { it.toString().toInt() } The map could be further simplified: map(Character::getNumericValue)
How do I print bytes as hexadecimal?
If you want to use C++ streams rather than C functions, you can do the following: int ar[] = { 20, 30, 40, 50, 60, 70, 80, 90 }; const int siz_ar = sizeof(ar) / sizeof(int); for (int i = 0; i < siz_ar; ++i) cout << ar[i] << ” “; cout << endl; for … Read more
Multi currency – what to store and when to convert?
Bear in mind that the answers you receive will be subjective. With that disclaimer out of the way, this is how I would go about setting up such a system. TL;DR: Use a currency rates table to store currency rates for different currencies and dates when they are applicable. Store amounts in both the local … Read more
Byte array to Hex string conversion in javascript
You are missing the padding in the hex conversion. You’ll want to use function toHexString(byteArray) { return Array.from(byteArray, function(byte) { return (‘0’ + (byte & 0xFF).toString(16)).slice(-2); }).join(”) } so that each byte transforms to exactly two hex digits. Your expected output would be 04812d7e3a9829e5d51bdd64ceb35df060699bc1309731bd6e6f1a5443a7f9ce0af4382fcfd6f5f8a08bb2619709c2d49fb771601770f2c267985af2754e1f8cf9
Windows-1252 to UTF-8 encoding
iconv -f WINDOWS-1252 -t UTF-8 filename.txt