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Code equivalent to the 'let' keyword in chained LINQ extension method calls

... Let doesn't have its own operation; it piggy-backs off of Select. You can see this if you use "reflector" to pull apart an existing dll. it will be something like: var result = names .Select(animalName => new { nameLength = animalName.Length, animalName}) .Where...
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What does SQL clause “GROUP BY 1” mean?

... SELECT account_id, open_emp_id ^^^^ ^^^^ 1 2 FROM account GROUP BY 1; In above query GROUP BY 1 refers to the first column in select statement which is account_id. You also can speci...
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How to load assemblies in PowerShell?

...me; These should also work: Add-Type -AssemblyName $TypeName -PassThru | Select-Object -ExpandProperty Assembly | Select-Object -ExpandProperty FullName -Unique If I want my script to always use a specific version of a .dll but I can't be certain of where it's installed, how do I determine what ...
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What is :: (double colon) in Python when subscripting sequences?

... TL;DR This visual example will show you how to a neatly select elements in a NumPy Matrix (2 dimensional array) in a pretty entertaining way (I promise). Step 2 below illustrate the usage of that "double colons" :: in question. (Caution: this is a NumPy array specific example with...
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Return empty cell from formula in Excel

...a by changing SomeRange to Range("MyRange"). To set a name for your cells, select the cells, click Define Name on the Formulas tab of the ribbon, and enter "MyRange" in the Name field. (And of course you could replace MyRange with anything you want.) – devuxer ...
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What is SYSNAME data type in SQL Server?

... Just as an FYI.... select * from sys.types where system_type_id = 231 gives you two rows. (i'm not sure what this means yet but i'm 100% sure it's messing up my code right now) edit: i guess what it means is that you should join by the user_...
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Insert multiple rows WITHOUT repeating the “INSERT INTO …” part of the statement?

... INSERT INTO dbo.MyTable (ID, Name) SELECT 123, 'Timmy' UNION ALL SELECT 124, 'Jonny' UNION ALL SELECT 125, 'Sally' For SQL Server 2008, can do it in one VALUES clause exactly as per the statement in your question (you just need to add a comma to separate eac...
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How to conditionally push an item in an observable array?

...the following ($parent is due to this being inside a table row loop): <select data-bind="visible: editing, hasfocus: editing, options: $parent.jobroles, optionsText: 'name', optionsValue: 'id', value: jobroleId, optionsCaption: '-- Select --'"> </select> <...
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Importing Maven project into Eclipse

...e Open Eclipse Click File > Import Type Maven in the search box under Select an import source: Select Existing Maven Projects Click Next Click Browse and select the folder that is the root of the Maven project (probably contains the pom.xml file) Click Next Click Finish ...
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foreach with index [duplicate]

... You can do the following foreach (var it in someCollection.Select((x, i) => new { Value = x, Index = i }) ) { if (it.Index > SomeNumber) // } This will create an anonymous type value for every entry in the collection. It will have two properties Value: with the ori...