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Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
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select <column> from <table> group by 1 having count(*) > 1; will give a report on duplicated values.
– Jasen
Aug 26 '16 at 22:57
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“’” showing on page instead of “ ' ”
...tion is wrong. You can also force your web browser to twingle the page by selecting windows-1252 encoding for a utf-8 document. Your web browser cannot detwingle the document that Charlie saved.
Note: the same problem can happen with any other single-byte code page (e.g. latin-1) instead of windo...
How to use a WSDL file to create a WCF service (not make a call)
...for. Try "Contract First" and WCF. or "WSDL First" and WCF.
Here is a selection:
Basic overview of WSDL-First development with WCF and SvcUtil.exe.
WSCF - A free add-in to Visual Studio enabling Contract-First design with WCF
Introduction to WSCF
A walkthrough of using WSCF
The WSCF proje...
How can you find the unused NuGet packages in a solution?
...n also project > Optimize Used References . . .
A window will pop up. Select all references and remove them all. Then go back and re-add the ones that give you a compiler error.
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How can I prevent the “You have mixed tabs and spaces. Fix this?” message?
...ch because of the way things laid out looked just like a space. Of course, selecting that class? Impossible, as it was "classA[tab]classB".
– David T. Macknet
Feb 9 '16 at 16:57
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JavaScript: Check if mouse button down?
...semove='handleMove(this);'>Click and drag me!</div>
The :active selector handles the mouse click much better than mouse up/down, you just need a way of reading that state in the onmousemove event. For that I needed to cheat and relied on the fact that the default cursor is "auto" and I ju...
Visual Studio popup: “the operation could not be completed”
... elements within the following element. You might want to be a little more selective and try to identify the site that is causing the conflict and remove just that.
<configuration><system.applicationHost><sites>
Note that I left the <siteDefaults>, <applicationDefaults&...
How to drop a list of rows from Pandas dataframe?
... +1, this is the only answer that tells you how to remove a row selecting a column different from the first one.
– Alejo Bernardin
May 3 at 5:31
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Swift alert view with OK and Cancel: which button tapped?
... in Xcode written in Swift and I'd like to determine which button the user selected (it is a confirmation dialog) to do nothing or to execute something.
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Showing Travis build status in GitHub repo
...me or org}/{repository}
Click the Status Image (a pop-up will appear)
Select a branch, then click the dropdown Image URL ▼ and set it to Markdown ▼.
Copy Paste the code to your README.md
Git add, commit & push. Refresh Github and you'll see the image now.
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