Posts (page 86)
-
3 min readIn Solr, you can declare various document types by defining a unique field in your schema.xml file for each type of document you wish to index. For example, if you want to index books and articles separately, you can create fields like "book_title", "book_author", "book_publisher" for books and "article_title", "article_author", "article_journal" for articles.
-
5 min readIn Elixir, modules are used to define and encapsulate functionality within a specific namespace. When specifying module implementation at compile time, you can use compiler directives such as @behaviour, @doc, and @moduledoc to provide additional information about the module to the compiler and enhance the readability of the code.
-
4 min readTo convert a text file with delimiters as fields into a Solr document, you can follow these steps:Prepare your text file with delimiters separating the fields.Use a file parsing tool or script to read the text file and extract the fields based on the delimiters.Map the extracted fields to the corresponding fields in your Solr schema.Create a Solr document object and populate it with the extracted field values.Index the Solr document into your Solr collection.
-
5 min readTo create a map from two arrays in Elixir, you can use the Enum.zip/2 function to combine the two arrays into a list of tuples, and then use the Enum.into function to convert this list of tuples into a map.Here's an example: arr1 = [:a, :b, :c] arr2 = [1, 2, 3] map = Enum.zip(arr1, arr2) |> Enum.into(%{}) IO.inspect(map) # Output: %{a: 1, b: 2, c: 3} In this example, the Enum.zip/2 function creates a list of tuples where each tuple contains an element from arr1 and arr2.
-
4 min readOne of the best ways to add a scheduler to Solr is by using a tool such as Apache NiFi. Apache NiFi provides a user-friendly interface for creating data flows and scheduling tasks. You can use NiFi to schedule indexing tasks for Solr, ensuring that your data is regularly updated and searchable.Another option is to use a cron job to schedule indexing tasks for Solr. By setting up a cron job on your server, you can schedule regular tasks to update your Solr index.
-
4 min readIn Elixir, the string data type is not considered an enum because strings and enums serve different purposes.Enums are used to represent a fixed set of values and provide functions to work with those values. They are typically used for defining constants or creating a collection of related values.On the other hand, strings are used to represent sequences of characters and are used for storing and manipulating text data.
-
7 min readTo periodically remove data from Apache Solr, you can use the Solr DataImportHandler (DIH) to schedule regular data imports and updates. The DataImportHandler allows you to define a data source and schedule when Solr should import or update data from that source.You can configure the DIH to run at specified intervals using a cron job or a similar scheduling tool to periodically remove outdated or unwanted data from your Solr index.
-
4 min readIn Elixir, the "@" symbol is used as a sigil to define module attributes. Module attributes are key-value pairs that are stored at the module level and can be accessed throughout the module. These attributes are often used to store metadata about the module or to provide configuration options. The "@" symbol is typically followed by the name of the attribute, such as "@example", and then the value assigned to that attribute.
-
4 min readScoring Solr autosuggestions can be achieved by configuring the Solr suggester component to take into account various factors such as the popularity of a suggestion, how closely it matches the user's query, and any custom boosting rules set by the developer. By specifying these parameters in the Solr configuration, the suggester can return more relevant and accurate suggestions to the user based on their input.
-
3 min readIn Elixir, you can flatten a nested list using the List.flatten/1 function. This function takes a list as input and returns a new list with all nested lists flattened into a single list. You can simply call List.flatten(your_nested_list) to flatten a nested list in Elixir.[rating:4418d73d-f96d-4383-97bd-2aa68e7b6810]What is the performance difference between iterating and flattening in Elixir.
-
2 min readTo group facet.field in Solr, you need to specify the field names that you want to group together in the facet.query parameter. This allows you to get facet counts for multiple fields in a single request. Additionally, you can also use the facet.pivot parameter to group fields hierarchically, allowing for more complex faceting options. By specifying the desired facet fields in the facet.query or facet.
-
6 min readTo get the value of a JSON property in Elixir, you can use the Jason.decode!/1 function from the Jason library to parse the JSON string into an Elixir map. Once you have the JSON parsed into a map, you can access the value of a specific property by using the key of the property as a key to access the value in the map. For example, if you have a JSON object json containing a property named name, you can get the value of the name property by accessing json["name"].