str_flatten_comma() 是专门为用逗号进行扁平化而设计的变体。它会自动识别 last 是否使用牛津逗号并处理 2 个元素的特殊情况。 用法 str_flatten(string, collapse = "", last = NULL, na.rm = FALSE) str_flatten_comma(string, last = NULL, na.rm = FALSE) 参数 string 输入向量。或者是一个字符向...
Julian Hyde updated CALCITE-4579: --- Summary: In Piglet, conversion of Pig Latin scripts that contain FLATTEN and STRSPLIT operators fails with ClassCastException (was: Conversion of PIG scripts containing FLATTEN and STRSPLIT commands fails with ClassCastException) > In Piglet, conversion of Pig...
A device for calibrating a multi-roller flattener for metal strip incorporates a metal measuring plate (5) with dimensions that allow its use between the upper and lower roll assemblies of the flattener and comprises a positioning system (60, 61, 62), to ensure positioning relative to the ...