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Rails Migration: Remove constraint
...ostgresql. rails defines it in the database specific adapter see postgres, mysql. can search for others in apidock. So, will have to check the database adapter for support, in case anyone gets a NotImplementedError
– deepak
Oct 24 '14 at 12:50
...
Understanding Magento Block and Block Type
.../template.
page/html: This is a subtype of core/template and defines the root block. All other blocks are child blocks of this block.
page/html_head: Defines the HTML head section of the page which contains elements for including JavaScript, CSS etc.
page/html_header: Defines the header part of th...
Determining complexity for recursive functions (Big O notation)
... tree. Once you have the recursive tree:
Complexity = length of tree from root node to leaf node * number of leaf nodes
The first function will have length of n and number of leaf node 1 so complexity will be n*1 = n
The second function will have the length of n/5 and number of leaf nodes again ...
How to insert a line break in a SQL Server VARCHAR/NVARCHAR string
...literals. It works this way in all engines I've tried (SQL Server, Oracle, MySQL, PostgreSQL and SQLite).
– Álvaro González
Feb 13 '14 at 15:32
...
内存调试技巧：C 语言最大难点揭秘 - C/C++ - 清泛网 - 专注C/C++及内核技术
...，需要特别关注 C 和 C++ 编程的内存问题。让我们看一看如何解决这些问题，先不谈是哪种语言。
内存错误的类别
首先，不要失去信心。有很多办法可以对付内存问题。我们先列出所有可能存在的实际问题：
内存泄漏
错误...
How to check if an activity is the last one in the activity stack for an application?
... selected answer is a hack. One should do it the right way using the isTaskRoot() method.
– Sufian
Apr 2 '14 at 6:17
@...
Where can I find php.ini?
...
Use the following commands to find the php.ini file path in linux.
[root@AnyDirectory ~]# locate php.ini
/etc/php.ini
/etc/php.ini.rpmnew
/usr/share/doc/php-common-5.4.45/php.ini-development
/usr/share/doc/php-common-5.4.45/php.ini-production
or try this another way
[root@AnyDirectory ~]...
PHP 5 disable strict standards error
...every page, that it requires. A way to solve this, is through .htaccess at root folder.
Just to hide the errors. [Put one of the followling lines in the file]
php_flag display_errors off
Or
php_value display_errors 0
Next, to set the error reporting
php_value error_reporting 30719
If you ar...
How do I import global modules in Node? I get “Error: Cannot find module ”?
...an use npm itself to tell you where global modules are stored with the npm root -g command. So putting those two together, you can make sure global modules are included in your search path with the following command (on Linux-ish)
export NODE_PATH=$(npm root --quiet -g)
...
Favorite Django Tips & Features?
...ttings.py
import os
PROJECT_DIR = os.path.dirname(__file__)
...
STATIC_DOC_ROOT = os.path.join(PROJECT_DIR, "static")
...
TEMPLATE_DIRS = (
os.path.join(PROJECT_DIR, "templates"),
)
Credits: I got this tip from the screencast 'Django From the Ground Up'.
...