在linux中为java process对象调用exitValue()时,我得到了"0“值,但偶尔子线程(错误和输出流读取器)不会完成,并卡在join中。private class ReadStdoutThread extends Thread { private StringBufferm_sb;
m
不久前,我在我的windows机器上安装了Ack,并与Vim一起工作得很好。不知道我最近做了什么,但现在不行了。:Ack searchtermack: searchterm: No such file or directory:!ack searchtermC:\WINDOWS\system32\cmd.exe /c ack searchtermshell
SELECT ticker_symb, day_sum_eff, cusip, nclos_prc, when clos_prc is null andnclos_prc is not null
then (nclos_prc - LAG( nclos_prc ignore nulls) OVER (ORDER BY cusip))when clos_prc is not null and nclos_<em
错误发生在prc_test_pred,它表示knn中的错误(prc_train= prc_train,test = prc_test,cl = prc_train_labels ):不允许缺少值。stringsAsFactors = FALSE prc <- prc[-1] #removes the first variable(id) from the data set<- as.data.frame(lapply