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How to uninstall editable packages with pip (installed with -e)
... for me using 8.1.2, pip uninstall package_name works, but pip uninstall . doesn't work
– confused00
Oct 2 '16 at 12:43
5
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What is the difference between exit() and abort()?
...ing atexit() first, and without calling objects' destructors first. exit() does both before exiting your program. It does not call destructors for automatic objects though. So
A a;
void test() {
static A b;
A c;
exit(0);
}
Will destruct a and b properly, but will not call destructor...
“Java DateFormat is not threadsafe” what does this leads to?
...ateFormat object, which means that each thread will have its own copy and doesn't need to wait for other threads to release it. This is how:
public class DateFormatTest {
private static final ThreadLocal<DateFormat> df = new ThreadLocal<DateFormat>(){
@Override
protected Dat...
How can I convince IE to simply display application/json rather than offer to download it?
...ype: application/json or Content-Type: text/json is like this:
What it does, why it works:
The 25336920-03F9-11cf-8FD0-00AA00686F13 is the CLSID for the "Browse in place" action. Basically this registry entry is telling IE that for docs that have a mime type of application/json, just view it ...
How does a language expand itself? [closed]
...s not written in C++. So the fact that C++ didn't provide any way to do it doesn't prevent it from being added, so long as there is some way to do it outside of C++.
At a quite low level, some functions called by C++ (or by C) will be written in assembly, and the assembly contains the required inst...
How to change column order in a table using sql query in sql server 2005?
...'s almost always absolutely irrelevant.
What SQL Server Management Studio does in the background when you change column order there is recreating the table from scratch with a new CREATE TABLE command, copying over the data from the old table, and then dropping it.
There is no SQL command to defin...
Is there an “exists” function for jQuery?
... @abhirathore2006 If you use an id selector and the element doesn't exist then length is 0 and doesn't throw exceptions.
– Robert
Jun 29 '17 at 20:35
15
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How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
... are given below, this feature works with multiple conflicting rows and it doesn't require exclusive locking or a retry loop.
The commit adding the feature is here and the discussion around its development is here.
If you're on 9.5 and don't need to be backward-compatible you can stop reading now.
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Does the ternary operator exist in R?
...
It doesn't explicitly exist, but you can do:
set.seed(21)
y <- 1:10
z <- rnorm(10)
condition1 <- TRUE
x1 <- if(condition1) y else z
or
condition2 <- sample(c(TRUE,FALSE),10,TRUE)
x2 <- ifelse(condition2, y...
How do I revert all local changes in Git managed project to previous state?
...
git reset doesn't reset your changes, git reset --hard does that.
– Cerin
Jul 6 '16 at 16:59
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