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Rails Root directory path?
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In Rails 3 and newer:
Rails.root
which returns a Pathname object. If you want a string you have to add .to_s. If you want another path in your Rails app, you can use join like this:
Rails.root.join('app', 'assets', 'images', 'logo...
Should private helper methods be static if they can be static
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edited Jun 6 '12 at 5:23
blong
2,65566 gold badges3232 silver badges9090 bronze badges
answered Feb 1...
What is the difference between AF_INET and PF_INET in socket programming?
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pzp
5,58111 gold badge2222 silver badges3535 bronze badges
answered Jul 18 '11 at 18:20
DamonDamon
59.3k1515 gold badg...
Writing string to a file on a new line every time
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314
Use "\n":
file.write("My String\n")
See the Python manual for reference.
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How to make the python interpreter correctly handle non-ASCII characters in string operations?
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83
Python 2 uses ascii as the default encoding for source files, which means you must specify anoth...
App Inventor 2 考勤系统教程 - 定位打卡与二维码签到 · App Inventor 2 中文网
... 1. 位置模拟检测
2. 动态二维码（每分钟更换）
3. WiFi辅助验证
数据管理
本地存储结构
上传到服务器
查看打卡记录
与已有文档的关系
常见问题
Q1: GPS定位精度不够？
Q2: 室...
App Inventor 2 屏幕适配教程 - 多分辨率适配方案 · App Inventor 2 中文网
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1. 使用 ScrollView处理长内容
2. 图片自适应
3. 横竖屏适配
4. 参考OctoStudio的实时测试
常见问题
Q1: 模拟器和真机显示差异大？
Q2: 固定像素在不同设备上大小不同？
Q3: 绝对布局中的标签...
Rank function in MySQL
...INSERT INTO person VALUES (2, 'Jane', 20, 'F');
INSERT INTO person VALUES (3, 'Jack', 30, 'M');
INSERT INTO person VALUES (4, 'Bill', 32, 'M');
INSERT INTO person VALUES (5, 'Nick', 22, 'M');
INSERT INTO person VALUES (6, 'Kathy', 18, 'F');
INSERT INTO person VALUES (7, 'Steve', 36, 'M');
INSERT INT...
What is the difference between lock and Mutex?
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samis
5,53666 gold badges2626 silver badges6161 bronze badges
answered Sep 17 '10 at 12:31
Darin DimitrovDarin...
When to use NSInteger vs. int
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322
You usually want to use NSInteger when you don't know what kind of processor architecture your...