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What does gcc's ffast-math actually do?
... --ffast-math flag can greatly increase speed for float ops, and goes outside of IEEE standards, but I can't seem to find information on what is really happening when it's on. Can anyone please explain some of the details and maybe give a clear example of how something would change if the flag was ...
Java String split removed empty values
...lit "" farther we will get as result [""] array.
It happens because split didn't happen here, so "" despite being empty and trailing represents original string, not empty string which was created by splitting process.
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What is the difference between include and extend in Ruby?
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What you have said is correct. However there is more to it than that.
If you have a class Klazz and module Mod, including Mod in Klazz gives instances of Klazz access to Mod's methods. Or you can extend Klazz with Mod giving the class Klazz...
Argparse: Way to include default values in '--help'?
...uding a minimal reproducible example that demonstrates the problem. As I said, it works for me with Python 2.7.
– Martijn Pieters♦
Apr 7 '16 at 20:00
3
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Iterate over the lines of a string
...t with other functions').
But the split-based approach still rules.
An aside: possibly better style for f4 would be:
from cStringIO import StringIO
def f4(foo=foo):
stri = StringIO(foo)
while True:
nl = stri.readline()
if nl == '': break
yield nl.strip('\n')
at ...
C# constructor execution order
...f this should be a comment/answer but for those who learn by example this fiddle illustrates the order as well: https://dotnetfiddle.net/kETPKP
using System;
// order is approximately
/*
1) most derived initializers first.
2) most base constructors first (or top-level in constructor-stack fi...
Can I set a breakpoint on 'memory access' in GDB?
...u want
(gdb) watch a*b + c/d: watch an arbitrarily complex expression, valid in the program's native language
Watchpoints are of three kinds:
watch: gdb will break when a write occurs
rwatch: gdb will break wnen a read occurs
awatch: gdb will break in both cases
You may choose the more appropr...
What characters are valid for JavaScript variable names?
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To quote Valid JavaScript variable names, my write-up summarizing the relevant spec sections:
An identifier must start with $, _, or any character in the Unicode categories “Uppercase letter (Lu)”, “Lowercase letter (Ll)”, ...
How to multiply duration by integer?
... * int64(rand.Int31n(1000)))
This way any part of the expression can be said to have a meaningful value according to its type. int64(time.Millisecond) part is just a dimensionless value - the number of smallest units of time in the original value.
If walk a slightly simpler path:
time.Duration(rand...
Creating functions in a loop
I'm trying to create functions inside of a loop:
2 Answers
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