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Pointers vs. values in parameters and return values
...n find situations where copying even large structs turns out a performance win, but the rule of thumb is not to.
For slices, you don't need to pass a pointer to change elements of the array. io.Reader.Read(p []byte) changes the bytes of p, for instance. It's arguably a special case of "treat littl...
Environment variable to control java.io.tmpdir?
...nd prior. It isn't reassuring that there's a way to do this other than on Windows.
On Windows, OpenJDK's get_temp_directory() function makes a Win32 API call to GetTempPath(); this is how on Windows, Java reflects the value of the TMP environment variable.
On Linux and Solaris, the same get_temp_...
How do I print a double value with full precision using cout?
... @AlecJacobson It should rather be max_digits10, not some arbitrary digits10+2. Otherwise, in the case of float, long double, boost::multiprecision::float128 this will fail, since there you'd need +3 instead of +2.
– Ruslan
May 27 '19 at 17:41
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Node.js: How to send headers with form data using request module?
I have code like the following:
5 Answers
5
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What is “2's Complement”?
...ooking for the reason for the range difference.
– Ashwin
Dec 26 '14 at 5:22
2
Shouldn't you say "...
Putty: Getting Server refused our key Error
I created key pair using puttygen.exe (client is windows 8). On server (Ubuntu 12.04.3 LTS), I have put my public key in ~/.ssh/authorized_keys . The public key is this:
...
How can I generate random alphanumeric strings?
... for (int i = 0; i < size; i++)
{
var rnd = BitConverter.ToUInt32(data, i * 4);
var idx = rnd % chars.Length;
result.Append(chars[idx]);
}
return result.ToString();
}
public static string GetUni...
How can I get the latest JRE / JDK as a zip file rather than EXE or MSI installer? [closed]
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It worked for the 64-bit version on Windows 7 on the jdk-8u31-windows-x64.
– digfish
Jan 29 '15 at 11:23
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Is gcc std::unordered_map implementation slow? If so - why?
...;< std::endl;
}
I used a SIZE of 10000000, and had to change things a bit for my version of boost. Also note, I pre-sized the hash table to match SIZE/DEPTH, where DEPTH is an estimate of the length of the bucket chain due to hash collisions.
Edit: Howard points out to me in comments that the ...
to_string is not a member of std, says g++ (mingw)
...inGW-w64 project. Despite the name, the project provides toolchains for 32-bit along with 64-bit. The Nuwen MinGW distro also solves this issue.
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