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What does the red exclamation point icon in Eclipse mean?
...o old machine. I resolved it as belows
Right click on the "Project name"
Select "Build path"
Then select "Configure Build Path"
Click on "Libraries"
Remove all the libraries which were referring to old path
Then, the exclamation symbol on the "Project name" was removed.
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Permission denied (publickey) when SSH Access to Amazon EC2 instance [closed]
...these steps:
Access to AWS Management Console
Open Elastic Beanstalk Tab
Select your application from All Applications Tab
From left side menù select Configuration
Click on the Instances Gear
In Server Form check the EC2 Key Pair input and select your new Key Pair. You may have to refresh the lis...
Hidden Features of Xcode 4
... View > Utilities > Code Snippet Library. To add a new code snippet, select some text in the editor view and drag it into the snippet library. You can either drag a snippet out and drop it in your code to use it, or, much more conveniently, assign a completion shortcut to it.
When you type i...
Where is debug.keystore in Android Studio
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EDIT
Step 1) Go to File > Project Structure > select project > go to "signing" and select your default or any keystore you want and fill all the details. In case you are not able to fill the details, hit the green '+' button. I've highlighted in the screenshot.
Step ...
Could not load file or assembly or one of its dependencies
...
Open IIS Manager
Select Application Pools
then select the pool you are using
go to advanced settings (at right side)
Change the flag of Enable 32-bit application false to true.
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SQL Server Installation - What is the Installation Media Folder?
... Server 2019 Developer version. Was lost with dialog prompted from step 3 "Select installation media". This Andy Leonard blog helped me: 1. Downloaded installation package from SQL Server downloads. 2. Launch downloaded wizard > Select installation type > Download media 3. Right-click on the d...
How do I ignore all files in a folder with a Git repository in Sourcetree?
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For Sourcetree users: If you want to ignore a specific folder, just select a file from this folder, right-click on it and do "Ignore...". You will have a pop-up menu where you can ignore "Ignore everything beneath: <YOUR UNWANTED FOLDER>"
If you have the "Ignore" option greyed out...
Convert an image (selected by path) to base64 string
How do you convert an image from a path on the user's computer to a base64 string in C#?
12 Answers
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postgresql COUNT(DISTINCT …) very slow
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You can use this:
SELECT COUNT(*) FROM (SELECT DISTINCT column_name FROM table_name) AS temp;
This is much faster than:
COUNT(DISTINCT column_name)
share
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How do I get the MAX row with a GROUP BY in LINQ query?
...t by t.SerialNumber
into g
select new
{
SerialNumber = g.Key,
uid = (from t2 in g select t2.uid).Max()
};
}
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