robin-sparkless 4.4.0

PySpark-like DataFrame API in Rust on Polars; no JVM.
Documentation 
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{
  "name": "string_concat",
  "pyspark_version": "3.5.0",
  "input": {
    "schema": [
      {
        "name": "id",
        "type": "bigint"
      },
      {
        "name": "first",
        "type": "string"
      },
      {
        "name": "last",
        "type": "string"
      }
    ],
    "rows": [
      [
        1,
        "Alice",
        "Smith"
      ],
      [
        2,
        "Bob",
        "Jones"
      ]
    ]
  },
  "operations": [
    {
      "op": "withColumn",
      "column": "full_name",
      "expr": "concat(col('first'), lit(' '), col('last'))"
    },
    {
      "op": "withColumn",
      "column": "initials",
      "expr": "concat_ws('.', col('first'), col('last'))"
    },
    {
      "op": "orderBy",
      "columns": [
        "id"
      ],
      "ascending": [
        true
      ]
    }
  ],
  "expected": {
    "schema": [
      {
        "name": "id",
        "type": "bigint"
      },
      {
        "name": "first",
        "type": "string"
      },
      {
        "name": "last",
        "type": "string"
      },
      {
        "name": "full_name",
        "type": "string"
      },
      {
        "name": "initials",
        "type": "string"
      }
    ],
    "rows": [
      [
        1,
        "Alice",
        "Smith",
        "Alice Smith",
        "Alice.Smith"
      ],
      [
        2,
        "Bob",
        "Jones",
        "Bob Jones",
        "Bob.Jones"
      ]
    ]
  }
}