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How to select a single field for all documents in a MongoDB collection?
... include several fields. In the following operation, find() method returns all documents that match the query. In the result set, only the item and qty fields and, by default, the _id field return in the matching documents.
db.inventory.find( { type: 'food' }, { item: 1, qty: 1 } )
In this example ...
How to encode URL parameters?
...
With PHP
echo urlencode("http://www.image.com/?username=unknown&password=unknown");
Result
http%3A%2F%2Fwww.image.com%2F%3Fusername%3Dunknown%26password%3Dunknown
With Javascript:
var myUrl = "http://www.image.com/?user...
Regular Expression to find a string included between two characters while EXCLUDING the delimiters
...
PHP:
$string ='This is the match [more or less]';
preg_match('#\[(.*)\]#', $string, $match);
var_dump($match[1]);
share
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Difference between __getattr__ vs __getattribute__
... the attribute wasn't found the usual ways. It's good for implementing a fallback for missing attributes, and is probably the one of two you want.
__getattribute__ is invoked before looking at the actual attributes on the object, and so can be tricky to implement correctly. You can end up in infi...
Convert line-endings for whole directory tree (Git)
...should be faster. You don't need the -name *.* either, unless you specifically want only files with a period somewhere in the name. That's a windows glob, not a *nix one.
– Useless
Aug 15 '11 at 17:31
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Header files for x86 SIMD intrinsics
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These days you should normally just include <immintrin.h>. It includes everything.
GCC and clang will stop you from using intrinsics for instructions you haven't enabled at compile time (e.g. with -march=native or -mavx2 -mbmi2 -mpopcnt -mfma ...
How to get the result of OnPostExecute() to main activity because AsyncTask is a separate class?
...sk<Void, Void, String> {
// you may separate this or combined to caller class.
public interface AsyncResponse {
void processFinish(String output);
}
public AsyncResponse delegate = null;
public MyAsyncTask(AsyncResponse delegate){
this.delegate = delegate;
}
...
Office在线预览及PDF在线预览的实现方式大集合 - 更多技术 - 清泛网 - 专注...
...用适合中文排版的纯Html、CSS技术。
2、接口简单，适合PHP、JSP、ASP.net等所有的对接，省心省力。
3、费用低廉，节省投入。
4、不用关心客户端是否安装了Office软件，不用在客户端部署。
5、手机在线预览2页Word文档只有3K大小...
MySQL: how to get the difference between two timestamps in seconds
...ifference between two timestamps in seconds, or would I need to do that in PHP? And if so, how would I go about doing that?
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What is the best way to exit a function (which has no return value) in python before the function en
...hod i use return, it still keep running code behind a. exit should be like php exit(), it breaks the program instantly.
– TomSawyer
Sep 24 '17 at 18:29
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