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App Inventor 2 QRCode 扩展：二维码扫描及生成方案都在这里 - App Invento...
App Inventor 2 QRCode 扩展：二维码扫描及生成方案都在这里1、QRCode 二维码扫码：使用原生的条码扫描器组件：2、二维码生成的方案：html + js + Web浏览器 方案3、QRCodeGenerator 拓展方案更多请参考这里。1、QRCode 二维码扫码：
使用原...
App Inventor 2 【源码】计算器 .aia 源码，有简单和混合两种模式 - App In...
App Inventor 2 【源码】计算器 .aia 源码，有简单和混合两种模式屏幕1：300+代码块。屏幕2：400+代码块。下载地址。
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Strings as Primary Keys in SQL Database [closed]
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edited Oct 27 '16 at 15:38
Jamie Lester
46844 silver badges1616 bronze badges
answered Fe...
Tool to track #include dependencies [closed]
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edited Oct 10 '10 at 22:02
Matt Joiner
94.2k8585 gold badges321321 silver badges483483 bronze badges
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SQL Server - SELECT FROM stored procedure
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152
You can use a User-defined function or a view instead of a procedure.
A procedure can return mu...
What good technology podcasts are out there?
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votes
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unix diff side-to-side results?
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output in two columns
Hence, say:
diff -y /tmp/test1 /tmp/test2
Test
$ cat a $ cat b
hello hello
my name my name
is me is you
Let's compare them:
$ diff -y a b
hello ...
Disable ActiveRecord for Rails 4
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261
If you are creating a new application, you can use -O to skip ActiveRecord:
rails new my_app ...
Why are Oracle table/column/index names limited to 30 characters?
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I believe it's the ANSI standard.
EDIT:
Actually, I think it's the SQL-92 standard.
A later version of the standard appears to optionally allow for 128 character names, but Oracle doesn't yet support this (or has partial support for it, insofar as it allows 30 characters. Hmmm.)
Search for "F3...
What's the difference between require and require-dev? [duplicate]
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232
The require-dev packages are packages that aren't necessary for your project to work and shoul...