大约有 8,200 项符合查询结果（耗时：0.0271秒） [XML]
Reading a file line by line in Go
...
NOTE: The accepted answer was correct in early versions of Go. See the highest voted answer contains the more recent idiomatic way to achieve this.
There is function ReadLine in package bufio.
Please note that if the line does not fit i...
What are all the common undefined behaviours that a C++ programmer should know about? [closed]
What are all the common undefined behaviours that a C++ programmer should know about?
11 Answers
...
How to use double or single brackets, parentheses, curly braces
I am confused by the usage of brackets, parentheses, curly braces in Bash, as well as the difference between their double or single forms. Is there a clear explanation?
...
Why would adding a method add an ambiguous call, if it wouldn't be involved in the ambiguity
...
Congratulations, you have found a bug in overload resolution. The bug reproduces in C# 4 and 5; it does not reproduce in the "Roslyn" version of the semantic analyzer. I've informed the C# 5 test team, and hopefully we can get this investigated and resolved before the final release. (As always, n...
Insert a commit before the root commit in Git?
I've asked before about how to squash the first two commits in a git repository.
15 Answers
...
Send attachments with PHP Mail()?
I need to send a pdf with mail, is it possible?
14 Answers
14
...
How to sort a dataframe by multiple column(s)
I want to sort a data.frame by multiple columns. For example, with the data.frame below I would like to sort by column z (descending) then by column b (ascending):
...
jQuery Ajax POST example with PHP
...form id="foo">
<label for="bar">A bar</label>
<input id="bar" name="bar" type="text" value="" />
<input type="submit" value="Send" />
</form>
jQuery:
// Variable to hold request
var request;
// Bind to the submit event of our form
$("#foo").submit(fu...
Why can't I forward-declare a class in a namespace using double colons?
...++ language fully-qualified names are only used to refer to existing (i.e. previously declared) entities. They can't be used to introduce new entities.
And you are in fact "reopening" the namespace to declare new entities. If the class Class is later defined as a member of different namespace - it ...
How does a garbage collector avoid an infinite loop here?
Consider the following C# program, I submitted it on codegolf as an answer to create a loop without looping:
3 Answers
...