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How to get a property value based on the name
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answered Apr 1 '11 at 0:45
Matt GreerMatt Greer
55.4k1515 gold badges116116 silver badges121121 bronze badges
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Split comma-separated strings in a column into separate rows
...es.
For smaller data frames, Matt's base R solution and data.table method 4 seem to have less overhead than the other methods.
Code
director <-
c("Aaron Blaise,Bob Walker", "Akira Kurosawa", "Alan J. Pakula",
"Alan Parker", "Alejandro Amenabar", "Alejandro Gonzalez Inarritu",
"Ale...
Is it possible to target older iOS versions when using Xcode 4.2 and iOS 5 SDK?
I just recently downloaded the Xcode 4.2 with iOS 5 SDK package and I immediately noticed that I am unable to use my iPhone 3Gs with iOS 4.2.1 for debugging. I am only able to debug and test on my iphone 4 with iOS 5 installed.
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App Inventor 2开发简单计算器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...程，并将按钮显示文本作为参数，传递给该过程。如图2-4所示。图2-4 在按钮点击事件中调用点击数字过程以此类推，其他9个按钮的点击事件处理程序也将如法炮制。如图2-5所示。图2-5 所有数字按钮的点击事件处理程序二、点击...
Maven project version inheritance - do I have to specify the parent version?
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answered May 14 '12 at 11:20
Michał KalinowskiMichał Kalinowski
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Git resolve conflict using --ours/--theirs for all files
...is the usual one.
This method should work through at least Git versions 2.4.x
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Laravel Migration Change to Make a Column Nullable
...});
Source: http://laravel.com/docs/5.0/schema#changing-columns
Laravel 4 does not support modifying columns, so you'll need use another technique such as writing a raw SQL command. For example:
// getting Laravel App Instance
$app = app();
// getting laravel main version
$laravelVer = explode(...
Identifying the dependency relationship for python packages installed with pip
...ask [installed: 0.10.1]
- Werkzeug [required: >=0.7, installed: 0.9.4]
- Jinja2 [required: >=2.4, installed: 2.7.2]
- MarkupSafe [installed: 0.18]
- itsdangerous [required: >=0.21, installed: 0.23]
alembic==0.6.2
- SQLAlchemy [required: >=0.7.3, installed: 0.9.1]
- ...
In C/C++ what's the simplest way to reverse the order of bits in a byte?
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answered Apr 8 '10 at 19:34
e.Jamese.James
106k3737 gold badges165165 silver badges207207 bronze badges
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Can't compare naive and aware datetime.now()
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147
By default, the datetime object is naive in Python, so you need to make both of them either nai...