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std::string截取字符串，截取ip:port - c++1y / stl - 清泛IT社区，为创新赋能！
std::string ip("127.0.0.1:8888");
int index = ip.find_last_of(':');
// 获取ip
ip.substr(0, index).c_str();
// 获取port
ip.substr(index + 1).c_str();
Static Block in Java [duplicate]
...ecuted when the class is loaded (or initialized, to be precise, but you usually don't notice the difference).
It can be thought of as a "class constructor".
Note that there are also instance initializers, which look the same, except that they don't have the static keyword. Those are run in additio...
Removing multiple files from a Git repo that have already been deleted from disk
...
If you simply run:
git add -u
git will update its index to know that the files that you've deleted should actually be part of the next commit. Then you can run "git commit" to check in that change.
Or, if you run:
git commit -a
It will automatically take these changes (...
how to implement a long click listener on a listview
...onItemLongClick(AdapterView<?> arg0, View v,
int index, long arg3) {
Toast.makeText(list.this,myList.getItemAtPosition(index).toString(), Toast.LENGTH_LONG).show();
return false;
}
});
...
HTML5 textarea placeholder not appearing
...ayed since the input area contains content (a newline character is, technically, valid content).
Good:
<textarea></textarea>
Bad:
<textarea>
</textarea>
Update (2020)
This is not true anymore, according to the HTML5 parsing spec:
If the next token is a U+000A LINE FEED (LF)...
Why am I seeing “TypeError: string indices must be integers”?
...
The variable item is a string. An index looks like this:
>>> mystring = 'helloworld'
>>> print mystring[0]
'h'
The above example uses the 0 index of the string to refer to the first character.
Strings can't have string indices (like dict...
How to add line breaks to an HTML textarea?
...\\\n
otherwise it gives Uncaught SyntaxError: Unexpected token ILLEGAL on all browsers.
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ICollection Vs List in Entity Framework
...d and remove items to an ICollection<T>
You can do random access (by index) to a List<T>
Out of those, ICollection and IEnumerable map well to database operations, since querying and adding/removing entities are things you might do in a DB.
Random access by index doesn't map as well, ...
Splitting on first occurrence
... Technically assumes the correct delimiter. The 'first' is the [1] index. The one we are all referencing would of course be the zero-ith index. :D Semantics.
– Izaac Corbett
Nov 15 '17 at 13:19
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How can I enable the Windows Server Task Scheduler History recording?
...ave a Windows Server 2008 with scheduled tasks running, mainly .bat files calling PHP files. I have 2 users on the server, one Admin and the other is a Standard user.
...