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Searching if value exists in a list of objects using Linq
...s => names.Contains(cus.FirstName));
or to retrieve the customer from csv of similar list
string input = "John,Max,Pete";
List<string> names = input.Split(',').ToList();
customer = customers.FirstOrDefault(cus => names.Contains(cus.FirstName));
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Why is React's concept of Virtual DOM said to be more performant than dirty model checking?
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Here's a comment by React team member Sebastian Markbåge which sheds some light:
React does the diffing on the output (which is a known serializable format, DOM attributes). This means that the source data can be of any format. It can be immutable data structures and state in...
How to impose maxlength on textArea in HTML using JavaScript
...ise the browser will enforce the limit).
– Juha Palomäki
Jan 20 '13 at 23:16
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Retrieving the last record in each group - MySQL
There is a table messages that contains data as shown below:
27 Answers
27
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How to express a NOT IN query with ActiveRecord/Rails?
...p(&:id).join(','). I can't remember if Rails will the argument into a CSV list if it is enumerable.
You could also do this:
# in topic.rb
named_scope :not_in_forums, lambda { |forums| { :conditions => ['forum_id not in (?)', forums.select(&:id).join(',')] }
# in your controller
Topic...
What is the App_Data folder used for in Visual Studio?
...published through the web server.
For example we use it to update a local CSV of a contact us form. If the preferred method of emails fails or any querying of the data source is required, the App_Data files are there.
It's not ideal, but it it's a good fall-back.
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“The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine” Error in importing
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Save it as a CSV file and import it as a flat source file.
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How to rename files and folder in Amazon S3?
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What if i need to rename all .csv files. how come i do?
– LUZO
Mar 22 '18 at 14:21
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Changing all files' extensions in a folder with one command on Windows
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I had to use #1: ren "*.csv" "#1.json"
– elmalto
Jun 10 '15 at 15:39
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Can you configure log4net in code instead of using a config file?
... setting hierarchy.Configured = true;.
– Eivind Gussiås Løkseth
Apr 5 '17 at 14:49
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Make sure ...