大约有 41,000 项符合查询结果（耗时：0.0526秒） [XML]
Difference between os.getenv and os.environ.get
...but the body also includes os.environ vs. os.environ.get() so this answer correct in at least some ways - incomplete, but correct.
– FKEinternet
Jul 1 '19 at 18:12
3
...
What does [ N … M ] mean in C aggregate initializers?
... the same value, write [first ... last] = value. This is a GNU extension. For example,
int widths[] = { [0 ... 9] = 1, [10 ... 99] = 2, [100] = 3 };
It is not portable. Compiling with -pedantic with tell you so.
How does it work here?
The preprocessor replaces #include <asm/unistd.h> wi...
How to get awaitable Thread.Sleep?
I'm writing a network-bound application based on await/sleep paradigm.
1 Answer
1
...
How do I avoid capturing self in blocks when implementing an API?
I have a working app and I'm working on converting it to ARC in Xcode 4.2. One of the pre-check warnings involves capturing self strongly in a block leading to a retain cycle. I've made a simple code sample to illustrate the issue. I believe I understand what this means but I'm not sure the "corre...
Redo merge of just a single file
...
This sort of worked for me. The index ended up in a merged state, but mergetool did not think that there were any outstanding merges. I just did the merge using vi, but it was weird anyway.
– Chris Cleeland
...
Android hide listview scrollbar?
Is there a way to hide scrollbar in ListView . I know it's possible for ScrollView but can't find a way for ListView scrollbar. Any ideas?
...
adding x and y axis labels in ggplot2
...ouldn't) pull columns out to send to ggplot. One advantage is that ggplot works with data.frames directly.
You can set the labels with xlab() and ylab(), or make it part of the scale_*.* call.
library("Sleuth2")
library("ggplot2")
ggplot(ex1221, aes(Discharge, Area)) +
geom_point(aes(size=NO3)) ...
Java Generics: Cannot cast List to List? [duplicate]
...ll b1.add(...) precisely because the compiler won't know whether it's safe or not.
Have a look at this section of Angelika Langer's Java Generics FAQ for more information.
share
|
improve this answ...
Triggering HTML5 Form Validation
I have a form with several different fieldsets. I have some Javascript that displays the field sets to the users one at a time. For browsers that support HTML5 validation, I'd love to make use of it. However, I need to do it on my terms. I'm using JQuery.
...
What is ApplicationException for in .NET?
...y use built-in exception classes, e.g. ArgumentNullException and NotSupportedException . However, sometimes I need to use a custom exception and in that case I write:
...