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Check if string contains only whitespace
...False otherwise.
A character is whitespace if in the Unicode character database (see unicodedata), either its general category is Zs (“Separator, space”), or its bidirectional class is one of WS, B, or S.
Combine that with a special case for handling the empty string.
Alternatively, you could u...
Regex to test if string begins with http:// or https://
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JakeTheSnake
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answered Jan 10 '11 at 2:03
cdhowiecdhowie
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Convert string with comma to integer
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How about this?
"1,112".delete(',').to_i
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Preventing twitter bootstrap carousel from auto sliding on page load
So is there anyway to prevent twitter bootstrap carousel from auto sliding on the page load unless the next or previous button is clicked?
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Image comparison - fast algorithm
I'm looking to create a base table of images and then compare any new images against that to determine if the new image is an exact (or close) duplicate of the base.
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How to split a delimited string in Ruby and convert it to an array?
...it(",").map { |s| s.to_i }
=> [1, 2, 3, 4]
Or for later versions of ruby (>= 1.9 - as pointed out by Alex):
>> "1,2,3,4".split(",").map(&:to_i)
=> [1, 2, 3, 4]
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做了个购物清单App后，我才真正搞懂App Inventor 2的变量 - App应用开发 - ...
...商品计数 → 全局变量 → 跨屏访问
- 持久化存储 → TinyDB + 全局变量 → 配合使用
关键实现
Step 1：初始化全局变量——构建数据地基
拖出一个 initialize global 积木：
initialize global shoppingList to [create empty list]
initialize glob...
Is mongodb running?
I have installed mongodb and the php drivers on my unix server.
9 Answers
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In what cases could `git pull` be harmful?
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Summary
By default, git pull creates merge commits which add noise and complexity to the code history. In addition, pull makes it easy to not think about how your changes might be affected by incoming changes.
The git pull command ...
Update just one gem with bundler
I use bundler to manage dependencies in my rails app, and I have a gem hosted in a git repository included as followed:
8 A...