大约有 27,000 项符合查询结果（耗时：0.0537秒） [XML]
What does tree-ish mean in Git?
...
What about entry 16 on your table? Does it mean you're not sure if it's a tree-ish or not? The 0 refers to the merge state, and this concept applies only to blobs, since the index doesn't even contain directories. See: stackoverflow.com/a/25806452/895245 . So ...
Why exactly is eval evil?
...g what macros are really for and not understanding that a function already does the job.
It often is the wrong tool for the job to use EVAL and it often indicates that the beginner does not understand the usual Lisp evaluation rules.
If you think you need EVAL, then check if something like FUNCALL, ...
What is a CSRF token ? What is its importance and how does it work?
...ould be worthy to note that script from www.cute-cat-pictures.org normally does not have access to your anti-CSRF token from www.mybank.com because of HTTP access control. This note is important for some people who unreasonably send a header Access-Control-Allow-Origin: * for every website response ...
Why does struct alignment depend on whether a field type is primitive or user-defined?
... change is going to be breaking something." The fact that this apparently does not manifest in 32 bit or mono may help (as per other comments).
– NPSF3000
Jul 15 '14 at 3:24
...
Why does fatal error “LNK1104: cannot open file 'C:\Program.obj'” occur when I compile a C++ project
... Compiling a project (VS 2008) with the /p argument (preprocess to a file) doesn't compile. But essentially it's a compiler option so it will do either but not both.
– Assaf Levy
Jun 14 '16 at 17:39
...
Does Python have “private” variables in classes?
...
Let me get this straight, so Python does not implement public nor private attributes because "its a pretence of security and encourages programmers to be responsible", however the community encourages the use of "_" to denote private variables and methods? Mayb...
How can I profile Python code line-by-line?
...
Does line_profiler work with Python 3? I couldn't get any information on that.
– user1251007
Jul 23 '12 at 15:02
...
How do ACID and database transactions work?
...ns that you can guarantee that all of a transaction happens, or none of it does; you can do complex operations as one single unit, all or nothing, and a crash, power failure, error, or anything else won't allow you to be in a state in which only some of the related changes have happened.
Consistenc...
Why are these numbers not equal?
...ual(...)).
if(isTRUE(all.equal(i,0.15))) cat("i equals 0.15") else cat("i does not equal 0.15")
yields
i equals 0.15
Some more examples of using all.equal instead of == (the last example is supposed to show that this will correctly show differences).
0.1+0.05==0.15
#[1] FALSE
isTRUE(all.equal...
performSelector may cause a leak because its selector is unknown
...assumes that the return value of the method it's calling is an object, but does not retain/release it. So you could end up creating a leak if your object is supposed to be released as in #3 above (that is, the method you're calling returns a new object).
For selectors you're trying to call that ret...