mapper

A noun referring to a person, typically a clerk, who marks or records data on a chart or map.

• 🇩🇪Substantiv, das eine Person bezeichnet, meist einen Angestellten, der Daten in ein Diagramm oder eine Karte einträgt oder aufzeichnet.

1. Data charting clerk B2 formal

   A clerk who marks or records data on a chart, graph, or map.

   • The mapper carefully plotted the sales figures on the bar chart.
   • He worked as a mapper at the census bureau, updating demographic maps.
   • The map room employed several mappers to record survey data.
   • She was hired as a mapper to visualize temperature changes over time.

   🇩🇪Datenkartierer

   Synonyme: chartistplotter

2. Computer processing function B2 formal IT

   In computing, a program or component that processes input data and transforms it into intermediate key-value pairs, commonly used in MapReduce or similar frameworks.

   • In the Hadoop framework, the mapper reads each line of input and emits key-value pairs.
   • The mapper function splits the text into words and counts occurrences.
   • Developers wrote a custom mapper to parse the log files.
   • Each mapper works on a subset of the data in parallel.

   🇩🇪Datenverarbeitungsfunktion

• mappers plural form
• mappers' possessive plural form
• mapper's possessive singular form