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Renaming table in rails
...
Remember that in Rails >= 3.1 you can use the change method.
class RenameOldTableToNewTable < ActiveRecord::Migration
def change
rename_table :old_table_name, :new_table_name
end
end
...
Looking to understand the iOS UIViewController lifecycle
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iOS 10,11 (Swift 3.1,Swift 4.0)
According to UIViewController in UIKit developers,
1. loadView()
This is where subclasses should create their custom view hierarchy if they aren't using a nib. Should never be called directly.
2. loadViewIf...
Why use Ruby instead of Smalltalk? [closed]
...ware to run, as can be seen this net.lang.st80 posting from 1983. Windows 3.1, NT and '95 and OS/2 were the first mass market operating systems on mainstream hardware capable of supporting a Smalltalk implementation with decent native system integration. Previously, Mac or workstation hardware wer...
Spring RestTemplate - how to enable full debugging/logging of requests/responses?
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This is not available until spring-3.1 version.
– Gyan
Jun 25 '14 at 11:55
3
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Selecting data frame rows based on partial string match in a column
...p hp drat wt qsec vs am gear carb
# Merc 240D 24.4 4 146.7 62 3.69 3.19 20.0 1 0 4 2
# Merc 230 22.8 4 140.8 95 3.92 3.15 22.9 1 0 4 2
# Merc 280 19.2 6 167.6 123 3.92 3.44 18.3 1 0 4 4
# Merc 280C 17.8 6 167.6 123 3.92 3.44 18.9 1 0 4 4
# Merc ...
Why can't variables be declared in a switch statement?
... don't declare any new variables? You worried me briefly, but none of G++ 3.1, Visual C++ 7 or Intel C++ 8 will generate any code for new scopes where you don't declare any variables.
– Chris Jefferson
Feb 7 '09 at 20:11
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What is the difference/usage of homebrew, macports or other package installation tools? [closed]
...cports has many more packages (~18.6 K) than there are Homebrew formulae (~3.1K), owing to its maturity. Homebrew is slowly catching up though.
Macport packages tend to be maintained by a single person.
Macports can keep multiple versions of packages around, and you can enable or disable them to t...
【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
...D规范与低功耗蓝牙中的HID规范用的是两个不同的通道。
3.1 角色BLE设备角色主要分为两种角色，主机（Master或Central）和从机（Peripheral），当主机和从机建立连接之后才能相互收发数据主机，主机可以发起对从机的扫描连接。例...
Differences between distribute, distutils, setuptools and distutils2?
...s packaging in the Python 3.3+ standard library, or distutils2 in 2.4+ and 3.1–3.2. (A backport will be available soon.) Distutils2 did not make the Python 3.3 release, and it was put on hold.
More info:
The fate of Distutils – Pycon Summit + Packaging Sprint detailed report
A Quick Diff bet...
facebook: permanent Page Access Token?
...bug"
"Expires" should be "Never"
(Tested with API Version 2.9-2.11, 3.0-3.1)
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