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Create unique constraint with null columns
...xes (the two partial ones and a total on top).
Aside: I advise not to use mixed case identifiers in PostgreSQL.
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What is the difference between Swing and AWT?
...'s point of view. Swing itself handles your widgets' layout and stacking. Mixing AWT and Swing is highly unsupported and can lead to ridiculous results, such as native buttons that obscure everything else in the dialog box in which they reside because everything else was created with Swing.
Becaus...
Biggest advantage to using ASP.Net MVC vs web forms
...member classic ASP will remember the nightmare of opening a page with code mixed in with html and javascript - even the smallest page was a pain to figure out what the heck it was doing. I could be wrong, and I hope I am, but MVC looks like going back to those bad old days.
When ASP.Net came along ...
jquery - return value using ajax result on success
...*
* jQuery ajax method with async = false, to return response
* @param {mix} selector - your selector
* @return {mix} - your ajax response/error
*/
function isSession(selector) {
return $.ajax({
type: "POST",
url: '/order.html',
data: {
issessi...
Edit and Continue: “Changes are not allowed when…”
...uickly.
Make sure you are in Debug Mode
Make sure you're not launching a mixed mode process
Try to set the CPU target to x86 rather than AnyCPU (on x64 machines)
Uncheck the Optimize Code checkbox for Debug Mode in Project Properties->Debug
Uncheck Enable Optimizations in Advanced Compiler Sett...
How to split last commit into two in Git
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You should use the index. After doing a mixed reset ("git reset HEAD^"), add
the first set of changes into the index, then commit them. Then commit the
rest.
You can use "git add" to put all changes made in a file to the index. If you
don't want to stage every mod...
How do I simulate a hover with a touch in touch enabled browsers?
...ss, and next time the hover behavior will be the other way around, totally mixed up.
A solution then would be, again, conditionally finding out which event we're in, or just doing separate ones, and use addClass() and removeClass() respectively on 'touchstart' and 'touchend', ensuring it always st...
App Inventor 2 DynamicComponents 拓展：动态创建AI2组件对象 · App Inventor 2 中文网
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DynamicComponents 拓展
.aix 拓展下载（最新版 v2.3.0）：
com.yusufcihan.DynamicComponents.aix
完全支持 App Inventor 2 的动态组件扩展。它基于 Java 的反射功能，因此只需键入类名称即可搜索类来创建组件。因此，它对特定组...
Why git can't do hard/soft resets by path?
...ting version of the file).
A soft reset for a path doesn't make sense.
A mixed reset for a path is what git reset -- <path> does.
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What's the difference between a temp table and table variable in SQL Server?
...092 | 19 | |
| LOP_DELETE_ROWS | LCX_TEXT_MIX | Unknown Alloc Unit | 16348 | 37 | 16348 | 37 | |
| LOP_FORMAT_PAGE | LCX_HEAP | Unknown Alloc Unit | 1596 | 19 | 1596 | 19 |...