equals2 {DIZtools}

Robust compare two elements and return true if both elements are the same. False otherwise. No 'NA' or 'NULL'.

Description

The base-R function '==' is not working in an intended way for NAs and boolean. This function fixes this.

Usage

equals2(v1, v2)

Arguments

v1

First vector or element

v2

Second vector or element

Value

The equality between both vectors.

References

http://www.cookbook-r.com/Manipulating_data/ Comparing_vectors_or_factors_with_NA/>

Examples

## Not run: 
  dt <-
    data.table::data.table(
      a = c(TRUE, TRUE, TRUE, FALSE, FALSE, FALSE, NA, NA, NA),
      b = c(TRUE, FALSE, NA, TRUE, FALSE, NA, TRUE, FALSE, NA)
    )
  dt[, "classic_result" := get("a") == get("b")]
  dt[, "result_expected" := equals2(get("a"), get("b"))]
  dt
  ## This is the result:
  #        a     b classic_result result_expected
  # 1:  TRUE  TRUE           TRUE            TRUE
  # 2:  TRUE FALSE          FALSE           FALSE
  # 3:  TRUE    NA             NA           FALSE
  # 4: FALSE  TRUE          FALSE           FALSE
  # 5: FALSE FALSE           TRUE            TRUE
  # 6: FALSE    NA             NA           FALSE
  # 7:    NA  TRUE             NA           FALSE
  # 8:    NA FALSE             NA           FALSE
  # 9:    NA    NA             NA            TRUE

## End(Not run)