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How do I perform the SQL Join equivalent in MongoDB?

...background as well, I would appreciate MongoDB taking a 'result set' (with selected returned fields) as input for a new query in one go, much like nested queries in SQL – Stijn Sanders Nov 26 '10 at 23:17 ...
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SourceKitService Terminated

...nd com.apple.CoreSimulator.CoreSimulatorService[3952]: The runtime for the selected device is not installed. What I did to correct this issue. If you are only having an issue within the context of a Swift project, try this alone first. If that doesn't work, then try all of the steps further belo...
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jQuery empty() vs remove()

... empty() will empty the selection of its contents, but preserve the selection itself. remove() will empty the selection of its contents and remove the selection itself. Consider: <div> <p><strong>foo</strong></p> &...
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Quicksort: Choosing the pivot

...states "Hoare suggested partitioning around the median of several randomly selected lines. Sedgewick [...] recommended choosing the median of the first [...] last [...] and middle". This indicates that both techniques for 'median-of-three' are known in the literature. (Update 2014-11-23: The articl...
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How to split last commit into two in Git

...do and unstage all of the changes from the last commit: git reset HEAD^ Selectively stage the first round of changes: git add -p Commit: git commit Commit the rest of the changes: git commit -a (In either step, if you undid a commit that added a brand new file and want to add this to the...
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Static hosting on Amazon S3 - DNS Configuration

...site. With the AWS console ( https://console.aws.amazon.com/s3/ ) you can select your bucket, click properties, then select the "Website" tab. Click enabled and set your index document to "index.html" and your error document to "404.html". You will also need to set your bucket with access permissi...
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Why do I get “Procedure expects parameter '@statement' of type 'ntext/nchar/nvarchar'.” when I try t

...r because @SQL needs to be NVARCHAR DECLARE @SQL VARCHAR(100) SET @SQL = 'SELECT TOP 1 * FROM sys.tables' EXECUTE sp_executesql @SQL So: DECLARE @SQL NVARCHAR(100) SET @SQL = 'SELECT TOP 1 * FROM sys.tables' EXECUTE sp_executesql @SQL ...
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Mysql - How to quit/exit from stored procedure

...RE v_workflow_count INT(10); -- checking if workflow created for package select count(*) INTO v_workflow_count from workflow w where w.package_id = package_id ; this_proc:BEGIN -- this_proc block start here IF v_workflow_count = 0 THEN select 'no work flow ' as 'workflow_status' ; ...
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Show data on mouseover of circle

...and you don't need the mousehandler. The code would be something like vis.selectAll("circle") .data(datafiltered).enter().append("svg:circle") ... .append("svg:title") .text(function(d) { return d.x; }); If you want fancier tooltips, you could use tipsy for example. See here for an ex...
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Importing CommonCrypto in a Swift framework

...code.app path which can vary system-to-system, especially if you use xcode-select to switch to a beta version, or are building on a CI server where multiple versions are installed in non-standard locations. You also don't need to hard code the SDK so this should work for iOS, macOS, etc. You also do...