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std::string的截取字符串的方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...例如截取ip:port，代码如下：std::string ip("127.0.0.1:8888");int index = ip.find_last_of(':'); ipip.substr(0, index)....例如截取ip:port，代码如下：
std::string ip("127.0.0.1:8888");
int index = ip.find_last_of(':');
//ip
ip.substr(0, index).c_str();
//port
ip.substr(index...
怎样用SendMessage发送LVN_COLUMNCLICK消息？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...);部分代码示例如下：BOOL ClickListColumn(CListCtrl& listCtrl, int index){ ...SendMessage(WM_NOTIFY, CtrlID, NM_LISTVIEW);
部分代码示例如下：
BOOL ClickListColumn(CListCtrl& listCtrl, int index)
{
if(index >= listCtrl.GetHeaderCtrl()->GetItemCount())
...
error C2220: 警告被视为错误 - 没有生成“object”文件 - C/C++ - 清泛网 ...
...ze_t 类型比较或赋值导致的，如：
vector<Foo> fooVec;
int index = 0;
..
for (index = 0; index < fooVec.size(); ++index)
{...}
将index的类型改成 size_t 或 size_t强转int 就可以了。
C2220
Python loop that also accesses previous and next values
...o the trick.
foo = somevalue
previous = next_ = None
l = len(objects)
for index, obj in enumerate(objects):
if obj == foo:
if index > 0:
previous = objects[index - 1]
if index < (l - 1):
next_ = objects[index + 1]
Here's the docs on the enumerate ...
CSS Background Opacity [duplicate]
...lt;/article>
Then apply some CSS
article {
position: relative;
z-index: 1;
}
article::before {
content: "";
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
opacity: .4;
z-index: -1;
background: url(path/to/your/image);
}
Sample: http://codepen.io/a...
Google App Engine: Is it possible to do a Gql LIKE query?
...adful for a well populated table.
In other words, every query must use an index. This is why you can only do =, > and < queries. (In fact you can also do != but the API does this using a a combination of > and < queries.) This is also why the development environment monitors all the qu...
How do I iterate over an NSArray?
...buffer using pointer arithmetic. This is much faster than calling -objectAtIndex: each time through the loop.
It's also worth noting that while you technically can use a for-in loop to step through an NSEnumerator, I have found that this nullifies virtually all of the speed advantage of fast enumer...
Convert a Git folder to a submodule retrospectively?
...e/repo-new.git'
repo_new_filter="$root/repo-new.sh"
Filter script
# The index filter script which converts our subdirectory into a submodule
cat << EOF > "$repo_new_filter"
#!/bin/bash
# Submodule hash map function
sub ()
{
local old_commit=\$(git rev-list -1 \$1 -- '$repo_old_direc...
Convert a list to a dictionary in Python
...or this pretty easily:
a = ['hello','world','1','2']
my_dict = {item : a[index+1] for index, item in enumerate(a) if index % 2 == 0}
This is equivalent to the for loop below:
my_dict = {}
for index, item in enumerate(a):
if index % 2 == 0:
my_dict[item] = a[index+1]
...
C# Iterating through an enum? (Indexing a System.Array)
...
Hello, I've seen mention before of this suspicion of "index-mismatching" occurring when doing this; however, I've yet to discover whether this really is a concern or not? Are there any definitive cases whereby this assumption may go awry? Thx!
– Funka
...