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搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...
public class TestMongoDBReplSet {
public static void main(String[] args) {
try {
List addresses = new ArrayList();
ServerAddress address1 = new ServerAddress("192.168.1.136" , 27017);
ServerAddress add...
Is there a way to provide named parameters in a function call in JavaScript?
...se to what you want, but it is based on the output of Function.prototype.toString [ES5], which is implementation dependent to some degree, so it might not be cross-browser compatible.
The idea is to parse the parameter names from the string representation of the function so that you can associate t...
Upload files with HTTPWebrequest (multipart/form-data)
...request stream. Here is the result:
public static void HttpUploadFile(string url, string file, string paramName, string contentType, NameValueCollection nvc) {
log.Debug(string.Format("Uploading {0} to {1}", file, url));
string boundary = "---------------------------" + DateTime...
Efficient string concatenation in C++
I heard a few people expressing worries about "+" operator in std::string and various workarounds to speed up concatenation. Are any of these really necessary? If so, what is the best way to concatenate strings in C++?
...
launch sms application with an intent
..._INT >= Build.VERSION_CODES.KITKAT) // At least KitKat
{
String defaultSmsPackageName = Telephony.Sms.getDefaultSmsPackage(this); // Need to change the build to API 19
Intent sendIntent = new Intent(Intent.ACTION_SEND);
sendIntent.setType("text/plain");
...
MVC (Laravel) where to add logic
...extends Controller
{
/**
* Creates a new post.
*
* @return string
*/
public function store(PostRequest $request)
{
if ($request->persist(new Post())) {
flash()->success('Successfully created new post!');
} else {
flash()->e...
How to initialize a List to a given size (as opposed to capacity)?
...
List<string> L = new List<string> ( new string[10] );
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Reload Flask app when template file changes
...pplication when the templates change (or any other file), you can pass the extra_files argument to Flask().run(), a collection of filenames to watch: any change on those files will trigger the reloader.
Example:
from os import path, walk
extra_dirs = ['directory/to/watch',]
extra_files = extra_di...
JSON.stringify without quotes on properties?
...most cases:
const object = { name: 'John Smith' };
const json = JSON.stringify(object); // {"name":"John Smith"}
console.log(json);
const unquoted = json.replace(/"([^"]+)":/g, '$1:');
console.log(unquoted); // {name:"John Smith"}
Extreme case:
var json = '{ "name": "J\\":ohn Smit...
What does enctype='multipart/form-data' mean?
...ke.
application/x-www-form-urlencoded is more or less the same as a query string on the end of the URL.
multipart/form-data is significantly more complicated but it allows entire files to be included in the data. An example of the result can be found in the HTML 4 specification.
text/plain is i...