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C++实现句柄多版本过期置old的思路 - C/C++ - 清泛网 - 专注C/C++及内核技术
...解决。轻量级的不使用MVCC的话，思路如下：核心ObjPtrmap<id, ObjPtr> map_;Get的时候返回最新的ObjPtr；当ObjPtr有新版本要更新的时候，将map中对应id的ObjPtr中is 使用MVCC可以解决。
轻量级的不使用MVCC的话，思路如下：
核心ObjPtr
m...
自定义下载器扩展：个性化下载进度展示 - App Inventor 2 拓展 - 清泛IT社...
...gered when an error occurs during download.
Successful Download downloadId, filePath, fileSize, fileName
Event triggered to report download progress, speed, eta, fileSize, and downloadedSize
Download the file of given URL to the given path with
CustomFilePath.isEmpty : filePath = /storage/...
MySQL Fire Trigger for both Insert and Update
...et easier maintenance and a guarantee that the two triggers' code won't accidentally diverge.
– derobert
Oct 9 '19 at 14:30
|
show 1 more co...
How to use ssh agent forwarding with “vagrant ssh”?
...Vagrant.configure("2") do |config|
config.ssh.private_key_path = "~/.ssh/id_rsa"
config.ssh.forward_agent = true
end
config.ssh.private_key_path is your local private key
Your private key must be available to the local ssh-agent. You can check with ssh-add -L, if it's not listed add it with s...
How to scroll to bottom in a ScrollView on activity startup
...ne as following:
getScrollView().post(new Runnable() {
@Override
public void run() {
getScrollView().fullScroll(ScrollView.FOCUS_DOWN);
}
});
This way the view is first updated and then scrolls to the "new" bottom.
...
How to use ArrayAdapter
...iew;
}
public MyClassAdapter(Context context, int textViewResourceId, ArrayList<MyClass> items) {
super(context, textViewResourceId, items);
}
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
conve...
How do I get NuGet to install/update all the packages in the packages.config?
...ink so without installing something like NuGet Power Tools - github.com/davidfowl/NuGetPowerTools. However that will do essentially the same thing as the auto-restore you already have.
– Matt Ward
Mar 10 '12 at 17:06
...
gdb fails with “Unable to find Mach task port for process-id” error
...it isn't enough to codesign the gdb executable.
You have to follow this guide to make it work: http://www.opensource.apple.com/source/lldb/lldb-69/docs/code-signing.txt
The guide explains how to do it for lldb, but the process is exactly the same for gdb.
...
Capturing URL parameters in request.GET
...ts.get(username=username)
message = request.GET.get('message')
As a side note, you'll find the request method (in this case "GET", and for submitted forms usually "POST") in request.method. In some cases it's useful to check that it matches what you're expecting.
Update: When deciding whether...
ReactJS Two components communicating
...alled on the onChange event to filter the list with the current value.
JSFiddle for #1 →
/** @jsx React.DOM */
var Filters = React.createClass({
handleFilterChange: function() {
var value = this.refs.filterInput.getDOMNode().value;
this.props.updateFilter(value);
},
render: functi...