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What is href=“#” and why is it used?
...location.
Hash:
A hash - # within a hyperlink specifies an html element id to which the window should be scrolled.
href="#some-id" would scroll to an element on the current page such as <div id="some-id">.
href="//site.com/#some-id" would go to site.com and scroll to the id on that page...
Reference alias (calculated in SELECT) in WHERE clause
...sion is extremely complex (or costly to calculate) you should probably consider a computed column (and perhaps persisted) instead, especially if a lot of queries refer to this same expression.
PS your fears seem unfounded. In this simple example at least, SQL Server is smart enough to only perform ...
How to add custom method to Spring Data JPA
I am looking into Spring Data JPA. Consider the below example where I will get all the crud and finder functionality working by default and if I want to customize a finder then that can be also done easily in the interface itself.
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Center a button in a Linear layout
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If you want to center an item in the middle of the screen don't use a LinearLayout as these are meant for displaying a number of items in a row.
Use a RelativeLayout instead.
So replace:
android:layout_gravity="center_vertical|center_horizontal"
for the re...
What are the details of “Objective-C Literals” mentioned in the Xcode 4.4 release notes?
...23.45;
number = @YES;
[Edit]
zxoq at http://news.ycombinator.com/item?id=3672744 has added more interesting new subscripting. (Added with literals):
arr[1] === [arr objectAtIndex:1]
dict[@"key"] === [dict objectForKey:@"key"]
[Edit 2]
The new ObjC literals were discussed in multiple ...
How do PHP sessions work? (not “how are they used?”)
...re usually stored in, say, /tmp/ on the server, and named sess_{session_id} . I have been looking at the contents and cannot figure out how they really work.
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When to use single quotes, double quotes, and backticks in MySQL
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Backticks are to be used for table and column identifiers, but are only necessary when the identifier is a MySQL reserved keyword, or when the identifier contains whitespace characters or characters beyond a limited set (see below) It is often recommended to avoid using ...
SVG图像加载扩展 - 第三方扩展集合 · App Inventor 2 中文网
...径)
从应用资源目录加载SVG文件。
设置元素颜色(元素ID,颜色)
设置指定SVG元素的颜色。
设置元素透明度(元素ID,透明度)
设置指定SVG元素的透明度。
动画元素(元素ID,动画类型,持续时间)
为指定SVG元素添加动画效果。
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“Rate This App”-link in Google Play store app on the phone
I'd like to put a "Rate This App"-link in an Android App to open up the app-listing in the user's Google Play store app on their phone.
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Using -performSelector: vs. just calling the method
... background thread, and for calling back results to the main thread from said background thread.
– PeyloW
Sep 30 '09 at 8:36
2
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