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How to implement a confirmation (yes/no) DialogPreference?
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I know how to build a Dialog, but my q about preferences.
– sh1ng
Feb 26 '11 at 14:45
1
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Get record counts for all tables in MySQL database
...ount FROM my_schema.host UNION
SELECT "ndb_binlog_index" AS table_name, COUNT(*) AS exact_row_count FROM my_schema.ndb_binlog_index UNION
Copy and paste except for the last UNION to get nice output like,
+------------------+-----------------+
| table_name | exact_r...
Random record in ActiveRecord
...that using offset is very slow with large dataset, since it actually needs index scan (or table scan, in case clustered index is used like InnoDB). In other words, it's O(N) operation but "WHERE id >= #{rand_id} ORDER BY id ASC LIMIT 1" is O(log N), which is much faster.
– k...
技术人员如何创业《一》—— 产品及想法 - 资讯 - 清泛网 - 专注C/C++及内核技术
...销方式、整合自身独有的资源优势（哈佛）。其实他这个php网站我想现在很多学过web编程的都可以制造出来，有几个能做成facebook呢？
在《中国合伙人》中也有个场景，成东青因为在外面开小班被大学辞退了。最后一堂课时改...
How do I uniquely identify computers visiting my web site?
...es JSONP (Wikipedia)
example.com/assets/js/tracking.js (actually tracking.php)
var now = new Date();
var window.__sid = "SessionID"; // Server generated
setCookie("sid", window.__sid, now.setFullYear(now.getFullYear() + 1, now.getMonth(), now.getDate() - 1));
if( "localStorage" in window ) {
w...
SQL “select where not in subquery” returns no results
...mortech's answer and @rexem's comments.
If either Table1 or Table2 is not indexed on commonID, you get a table scan but @patmortech's query is still twice as fast (for a 100K row master table).
If neither are indexed on commonID, you get two table scans and the difference is negligible.
If both a...
Change type of varchar field to integer: “cannot be cast automatically to type integer”
...f the error still occurs, then it may be related not to column values, but indexes over this column or column default values might fail typecast. Indexes need to be dropped before ALTER COLUMN and recreated after. Default values should be changed appropriately.
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Joining three tables using MySQL
... answered Sep 21 '10 at 6:21
PHP FerrariPHP Ferrari
13.5k2424 gold badges7777 silver badges143143 bronze badges
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Hash and salt passwords in C#
...thSaltBytes);
}
The salt generation is as the example in the question. You can convert text to byte arrays using Encoding.UTF8.GetBytes(string). If you must convert a hash to its string representation you can use Convert.ToBase64String and Convert.FromBase64String to convert it back.
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Crop MP3 to first 30 seconds
...exe win32 process. I assume something similar could be done in your Linux/PHP scenario.
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