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Understanding slice notation
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The other feature is that start or stop may be a negative number, which means it counts from the end of the array instead of the beginning. So:
a[-1] # last item in the array
a[-2:] # last two items in the array
a[:-2] # everything except the last two items
Similarly, step may be a nega...
Download file of any type in Asp.Net MVC using FileResult?
... supports this natively. The System.Web.MVC.Controller.File controller provides methods to return a file by name/stream/array.
For example using a virtual path to the file you could do the following.
return File(virtualFilePath, System.Net.Mime.MediaTypeNames.Application.Octet, Path.GetFileName(v...
What's the difference between SCSS and Sass?
...used throughout this reference, is an extension of the syntax of CSS. This means that every valid CSS stylesheet is a valid SCSS file with the same meaning. This syntax is enhanced with the Sass features described below. Files using this syntax have the .scss extension.
The second and older syntax, ...
Generic deep diff between two objects
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And how do you mean "lacking the deep array value compare" for arrays you'll get for each index that {type: ..., data:..} object. What is missing is searching value from first array in second, but as I mentioned in my answer I don't think t...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
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创建一个测试数据表，sql如下：
CREATE TABLE users (
id INTEGER PRIMARY KEY,
name TEXT,
age INTEGER);
数据表信息
这时，可以查看一下表信息：
插入数据
往 users 表中插入一条测试数据...
Fling gesture detection on grid layout
I want to get fling gesture detection working in my Android application.
18 Answers
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Create a unique number with javascript time
I need to generate unique id numbers on the fly using javascript. In the past, I've done this by creating a number using time. The number would be made up of the four digit year, two digit month, two digit day, two digit hour, two digit minute, two digit second, and three digit millisecond. So it w...
What character to use to put an item at the end of an alphabetic list?
... crazy way others suggest". I came here looking for such a char too. But I meant something like {, } or ~ which are behind z in ASCII. After reading the most up-voted answers, I was tempted to use the Japanese character because it looks kind of cool. Fortunately this answer has put me back on Earth ...
What is jQuery Unobtrusive Validation?
I know what the jQuery Validation plugin is. I know the jQuery Unobtrusive Validation library was made by Microsoft and is included in the ASP.NET MVC framework. But I cannot find a single online source that explains what it is. What is the difference between the standard jQuery Validation librar...
What is the difference between the template method and the strategy patterns?
...hoice happens at runtime (making an algorithm choice at compile time would mean hard-coding it). The main difference between the two is how the concrete algorithm is implemented. Is it implemented as a subclass or as a separate interface? The former is a Template. The latter is a Strategy. The diffe...