No, there’s no PEP. There’s an issue in the bug tracker, and an associated discussion on the Python developers mailing list. While I was responsible for proposing and implementing the change, I can’t claim it was my idea: it had arisen during conversations with Guido at EuroPython 2010. Some more details: as already mentioned in … Read more
This is a bit tricky in python, because aren’t looking to convert the floating-point value to a (hex) integer. Instead, you’re trying to interpret the IEEE 754 binary representation of the floating-point value as hex. We’ll use the pack and unpack functions from the built-in struct library. A float is 32-bits. We’ll first pack it … Read more
strconv.FormatFloat(10.900, ‘f’, -1, 64) This will result in 10.9. The -1 as the third parameter tells the function to print the fewest digits necessary to accurately represent the float. See here: https://golang.org/pkg/strconv/#FormatFloat
The following should line everything up correctly: printf(“ABC %6.1f DEF\n”, test); printf(“ABC %6.1f DEF\n”, test2); When I run this, I get: ABC 1234.5 DEF ABC 14.5 DEF The issue is that, in %5.1f, the 5 is the number of characters allocated for the entire number, and 1234.5 takes more than five characters. This results in … Read more
When int is promoted to unsigned in the integral promotions, negative values are also lost (which leads to such fun as 0u < -1 being true). Like most mechanisms in C (that are inherited in C++), the usual arithmetic conversions should be understood in terms of hardware operations. The makers of C were very familiar … Read more
It is because JS uses double precision for the numbers, but if you want to perform operations with bits, the task is nontrivial, so a specific instruction to convert JS double into integer makes the thing easier. This ARM link explains it very well: https://community.arm.com/processors/b/blog/posts/armv8-a-architecture-2016-additions In order to add more information regarding fuz’s comment, the … Read more