大约有 45,471 项符合查询结果（耗时：0.0457秒） [XML]
Factors in R: more than an annoyance?
... (and most users miss this subtlety). I say they are useful because model fitting packages like lme4 use factors and ordered factors to differentially fit models and determine the type of contrasts to use. And graphing packages also use them to group by. ggplot and most model fitting functions coerc...
Circle-Rectangle collision detection (intersection)
...
There are only two cases when the circle intersects with the rectangle:
Either the circle's centre lies inside the rectangle, or
One of the edges of the rectangle has a point in the circle.
Note that this does not require the rectangle to be axis-parallel.
(One way to s...
Scanner is skipping nextLine() after using next() or nextFoo()?
...xtInt method does not read the newline character in your input created by hitting "Enter," and so the call to Scanner.nextLine returns after reading that newline.
You will encounter the similar behaviour when you use Scanner.nextLine after Scanner.next() or any Scanner.nextFoo method (except nextLi...
How can I loop through a C++ map of maps?
...ions, and avoids unnecessary copies.
Some favour replacing the comments with explicit definitions of reference variables (which get optimised away if unused):
for(auto const &ent1 : mymap) {
auto const &outer_key = ent1.first;
auto const &inner_map = ent1.second;
for(auto const ...
How do I get the number of elements in a list?
...
The len() function can be used with several different types in Python - both built-in types and library types. For example:
>>> len([1,2,3])
3
Official 2.x documentation is here: len()
Official 3.x documentation is here: len()
...
How can I maximize the editor pane in IntelliJ IDEA?
In Eclipse, I can type Ctrl + M or click the maximize icon in the editor pane to make the editor pane take up the entire Eclipse window, and then again to restore the pane back to its previous size exposing the other panes.
...
Is it possible to preview stash contents in git?
... a few weeks later, I want to inspect the stash, and find out what changes it would make if I applied it to working tree in its current state.
...
What's default HTML/CSS link color?
I need its code representation, like #FFFFFF .
10 Answers
10
...
When do I need to use a semicolon vs a slash in Oracle SQL?
...have been having some debate this week at my company as to how we should write our SQL scripts.
6 Answers
...
Too many 'if' statements?
The following code does work how I need it to, but it's ugly, excessive or a number of other things. I've looked at formulas and attempted to write a few solutions, but I end up with a similar amount of statements.
...