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Best way to represent a fraction in Java?
...on("Unknown format '" + s + "'");
}
// this translates 23.123e5 to 25,123 / 1000 * 10^5 = 2,512,300 / 1 (GCD)
String whole = m.group(1);
String decimal = m.group(2);
String exponent = m.group(3);
String n = whole;
// 23.123 => 23123
...
Split comma-separated strings in a column into separate rows
...me number of strings. i.e. data.table(id= "X21", a = "chr1;chr1;chr1", b="123;133;134",c="234;254;268") becoming data.table(id = c("X21","X21",X21"), a=c("chr1","chr1","chr1"), b=c("123","133","134"), c=c("234","254","268")) ?
– Reilstein
Jan 19 '19 at 1:39
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Python argparse mutual exclusive group
... answered Dec 28 '14 at 10:38
Oz123Oz123
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How the single threaded non blocking IO model works in Node.js
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Node.js is built upon libuv, a cross-platform library that abstracts apis/syscalls for asynchronous (non-blocking) input/output provided by the supported OSes (Unix, OS X and Windows at least).
Asynchronous IO
In this programming model open/read/write oper...
mmap() vs. reading blocks
...g to find the final word on mmap / read performance on Linux and I came across a nice post (link) on the Linux kernel mailing list. It's from 2000, so there have been many improvements to IO and virtual memory in the kernel since then, but it nicely explains the reason why mmap or read might be fas...
Send file using POST from a Python script
Is there a way to send a file using POST from a Python script?
8 Answers
8
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What is the meaning and difference between subject, user and principal?
...clarify "User - subset of principal"? If John is the subject and "account #123" is his principal, the user is who? Are there two John's? Since Genus > Species > Individual is increasingly specific, John (user) should be more specific than John (subject). Or am I missing something?
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What is the equivalent to a JavaScript setInterval/setTimeout in Android/Java?
...ce of code a little bit later on the same thread, I use this:
new android.os.Handler().postDelayed(
new Runnable() {
public void run() {
Log.i("tag", "This'll run 300 milliseconds later");
}
},
300);
.. this is pretty much equivalent to
setTimeout(
func...
Context switches much slower in new linux kernels
We are looking to upgrade the OS on our servers from Ubuntu 10.04 LTS to Ubuntu 12.04 LTS. Unfortunately, it seems that the latency to run a thread that has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to belie...
The selected run destination is not valid for this action
...everal times. Basically, just set the Base SDK in Build Settings to Latest OS X and it should work properly.
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