大约有 47,000 项符合查询结果(耗时:0.0331秒) [XML]
Test for equality among all elements of a single vector
...degree of tolerance ;)
– hadley
Jan 22 '11 at 1:32
|
show ...
How can I negate the return-value of a process?
... $
@(#)Version: $Revision: 4.2 $
@(#)Last changed: $Date: 2005/06/22 19:44:07 $
@(#)Purpose: Invert success/failure status of command
@(#)Author: J Leffler
@(#)Copyright: (C) JLSS 1991,1997,2005
*/
#include <stdlib.h>
#include <unistd.h>
#include <sys/typ...
How do I upgrade my ruby 1.9.2-p0 to the latest patch level using rvm?
... npadnpad
4,93633 gold badges2020 silver badges2222 bronze badges
29
...
How to avoid scientific notation for large numbers in JavaScript?
...
22 Answers
22
Active
...
Which types can be used for Java annotation members?
...
answered Sep 22 '09 at 7:13
skaffmanskaffman
374k9292 gold badges779779 silver badges744744 bronze badges
...
Reshaping data.frame from wide to long format
...tan 1951 21,352
4: ALB Albania 1951 8,986
5: AFG Afghanistan 1952 22,532
6: ALB Albania 1952 10,058
7: AFG Afghanistan 1953 23,557
8: ALB Albania 1953 11,123
9: AFG Afghanistan 1954 24,555
10: ALB Albania 1954 12,246
Some alternative notations:
melt(setDT(wide), id....
Why does Lua have no “continue” statement?
...
answered Aug 19 '10 at 22:58
RBerteigRBerteig
37.1k66 gold badges7777 silver badges121121 bronze badges
...
Is there any performance gain in indexing a boolean field?
...
answered May 9 '12 at 22:02
Michael KoperMichael Koper
8,70655 gold badges3939 silver badges5656 bronze badges
...
Cassandra port usage - how are the ports used?
...
answered Oct 22 '12 at 10:23
Matthew O'RiordanMatthew O'Riordan
7,33333 gold badges4040 silver badges5656 bronze badges
...
Rails has_many with alias name
...
answered Jul 22 '09 at 4:32
Sam SaffronSam Saffron
118k7272 gold badges305305 silver badges492492 bronze badges
...
