大约有 31,000 项符合查询结果（耗时：0.0323秒） [XML]
Get the latest record from mongodb collection
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php7.1 mongoDB:
$data = $collection->findOne([],['sort' => ['_id' => -1],'projection' => ['_id' => 1]]);
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Select Last Row in the Table
... This method is worse actually. You are fetching last raw using PHP execution instead of doing it as DB level. What if table has millions of raw, then you know how much inefficient it can be?
– Bhaskar Dabhi
Nov 23 '16 at 6:59
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What is the exact problem with multiple inheritance?
...t – or have used it very badly. Judging MI by C++ is like judging OOP by PHP or judging automobiles by Pintos.
– Jörg W Mittag
Dec 13 '08 at 12:40
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What does Redis do when it runs out of memory?
...ation ground to a halt (writes not possible, reads were possible), running PHP scripts stopped dead in their tracks mid-way and had to be kill -9'd manually (even after memory was made available).
I assumed data loss (or data inconsistency) had occurred so I did a flushdb and restored from backups....
When should I use a composite index?
... it compares 5 ways of doing lat/lng searches: http://mysql.rjweb.org/doc.php/latlng#representation_choices (It references the link given above as one of the 5.) One of the other ways is this, and it points out that they are optimal for the particular case:
INDEX(geolat, geolng),
INDEX(geolng, g...
Is BCrypt a good hashing algorithm to use in C#? Where can I find it? [closed]
...ed is completely irrelevant; you'd be better off mentioning something like PHP type coercing problems with hash equality checks. Plus while largely suitable in a practical sense, PBKDF2 is a KDF, not a password hashing algorithm, whereas BCrypt is better suited. Regardless, it would make much more s...
Socket.IO Authentication
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This article (http://simplapi.wordpress.com/2012/04/13/php-and-node-js-session-share-redi/) shows how to
store sessions of the HTTP server in Redis (using Predis)
get these sessions from Redis in node.js by the session id sent in a cookie
Using this code you are able to get t...
Use dynamic (variable) string as regex pattern in JavaScript
...o add a (variable) tag to values with regex, the pattern works fine with PHP but I have troubles implementing it into JavaScript.
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What are 'get' and 'set' in Swift?
...t Programming Language from Apple, I have no Objective C background (only PHP, JS, and other but no Obj C)
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Iterate over object attributes in python
...ow I shouldn't.. but it helps me understand how things work. I come from a php background and used to do this kind of things daily
– Pablo Mescher
Jul 24 '12 at 19:01