Question

text = ['a,b', 'c,d']
text = ','.join(text)
text = text.split(',')
print(text)
# ['a', 'b', 'c', 'd']

如果所有的单元格都没有写任何内容，如何检查text1，text2，text3列？

预期输出示例

// Page_Load is just an example event here, change to any event you need
protected void Page_Load(object sender, EventArgs e)
{
    DetailsView dv = sender as DetailsView;

    //using linq to get the CheckBoxField control
    var field = dv.Fields.Cast<DataControlField>().Single(x => x.HeaderText == "TitleOfCheckboxField") as CheckBoxField;
}

Answer 1

我们可以使用rowSums

df[rowSums(df == '') < 2, ]

Answer 2

您可以这样做：

cols <- paste0("text", 1:3)
df[rowSums(df[cols] == "") < length(cols), ]

Answer 3

这是使用nchar + rowSums

的另一个基本R解决方案

subset(df,rowSums(nchar(as.matrix(df[-1])))>0)

这样

  id   text1   text2 text3
1  1     sth    more final
2  2         another   and
3  3 another     add where

Answer 4

使用dplyr的建议解决方案：

df <- data.frame(id = c(1,2,3,4),
           text1 = c("sth","","another",""),
           text2 = c("more","another","add",""),
           text3 = c("final","and","where",""),
           stringsAsFactors = FALSE)


library(dplyr)
df %>% 
  filter_at(vars(starts_with("text")), any_vars(!. %in% c("")))

返回：

  id   text1   text2 text3
1  1     sth    more final
2  2         another   and
3  3 another     add where

删除多于一列的行

4 个答案: