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普通码农和CTO之间的差距，就是这7点了 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...要以为名气大就不会被干掉，被干掉OpenSolaris、OpenOffice、Mysql个个历史悠久，名气大。）
那么究竟什么是“技术”？答案：数据结构、操作系统、计算机体系结构、数据库原理、编译器工作原理、软件工程方法论等。我们的所...
How to change Rails 3 server default port in develoment?
...matically be run when you run "rails" with Rails 3 gems installed from the root of your application.
APP_PATH = File.expand_path('../../config/application', __FILE__)
require File.expand_path('../../config/boot', __FILE__)
# THIS IS NEW:
require "rails/commands/server"
module Rails
class Serve...
Convert Base64 string to an image file? [duplicate]
...m.php-
'public_feeds' => [
'driver' => 'local',
'root' => public_path() . '/uploads/feeds',
],
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T-SQL: Selecting rows to delete via joins
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In MySQL you would get an error "Unknown table 'TableA' in MULTI DELETE" and that is because you declared an alias for TableA (a). Small adjustment: DELETE a FROM TableA a INNER JOIN TableB b on b.Bid = a.Bid and [my filter cond...
Count how many files in directory PHP
...nything to /path/to/dir would fail it, because first / means starting from root dir. If there were path/to/dir, then yes, __DIR__ . '/path/to/dir' would help (in this case you must use / after __DIR__
– Justinas
Feb 22 '19 at 14:30
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Computed / calculated / virtual / derived columns in PostgreSQL
...s defined in the SQL standard and implemented by some RDBMS including DB2, MySQL and Oracle. Nor the similar "computed columns" of SQL Server.
STORED generated columns are introduced with Postgres 12. Trivial example:
CREATE TABLE tbl (
int1 int
, int2 int
, product bigint GENERATED ALWAYS...
iOS app error - Can't add self as subview
...Has no effect if navigationLock is not the current lock.
- (NSArray *)popToRootViewControllerAnimated:(BOOL)animated navigationLock:(id)navigationLock; ///< Pops until there's only a single view controller left on the stack. Returns the popped controllers. Has no effect if navigationLock is not t...
Best way to synchronize local HTML5 DB (WebSQL Storage, SQLite) with a server (2 way sync) [closed]
...ains a JS library to synchronize the local HTML5 SQLite DB to a server DB (MySQL or other) :
http://quickconnect.pbworks.com/Using-Enterprise-Synchronization
To use this lib, you need to use the DataAccessObject of the framework to access your DB. It works by storing all the SQL request applied t...
jQuery dot in ID selector? [duplicate]
...
Use the escaping rules from the jQuery selectors API as follows:
$('#root\\.SomeCoolThing')
From the docs:
To use any of the meta-characters (such as
!"#$%&'()*+,./:;<=>?@[\]^`{|}~) as a literal part of a name, it must
be escaped with with two backslashes: \\. For example...
How to set up a PostgreSQL database in Django
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isn't there anything like MySQL workbench for Postgres?
– Sidhin S Thomas
Jun 27 '17 at 13:40
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