大约有 45,200 项符合查询结果（耗时：0.0573秒） [XML]
ActiveRecord OR query
....
or(t[:title].matches("%something%"))
)
The resulting SQL:
ree-1.8.7-2010.02 > puts Post.where(t[:author].eq("Someone").or(t[:title].matches("%something%"))).to_sql
SELECT "posts".* FROM "posts" WHERE (("posts"."author" = 'Someone' OR "posts"."title" LIKE '%something%'))
...
Controlling number of decimal digits in print output in R
...oblem, since R can handle number as small as .Machine$double.xmin (usually 2e-308).
Compare these two analyses.
x1 <- rnorm(50, 1, 1e-15)
y1 <- rnorm(50, 1 + 1e-15, 1e-15)
t.test(x1, y1) #Should throw an error
x2 <- rnorm(50, 0, 1e-15)
y2 <- rnorm(50, 1e-15, 1e-15)
t.test(x2, y2) #o...
What is the easiest/best/most correct way to iterate through the characters of a string in Java?
...
Thirumalai Parthasarathi
4,03111 gold badge2020 silver badges4040 bronze badges
answered Oct 13 '08 at 6:13
jjnguyjjnguy
...
Rolling back a remote Git repository
... |
edited Feb 7 '11 at 18:21
answered Feb 25 '09 at 23:51
e...
What is the difference between Directory.EnumerateFiles vs Directory.GetFiles?
...
|
edited Aug 28 at 12:04
Uwe Keim
35.7k3636 gold badges153153 silver badges255255 bronze badges
...
Fastest way to count exact number of rows in a very large table?
...
25 Answers
25
Active
...
Can we have multiple “WITH AS” in single sql - Oracle SQL
...
answered Oct 29 '13 at 9:41
DeepshikhaDeepshikha
8,64022 gold badges1717 silver badges2020 bronze badges
...
How do you write a migration to rename an ActiveRecord model and its table in Rails?
...
ndnenkov
32.2k99 gold badges6060 silver badges9090 bronze badges
answered Jan 23 '09 at 0:29
ReadonlyReadonly
...