大约有 10,000 项符合查询结果（耗时：0.0335秒） [XML]
Split column at delimiter in data frame [duplicate]
...
cbind(df, read.table(text = as.character(df$FOO), sep = "|"))
ID FOO V1 V2
1 11 a|b a b
2 12 b|c b c
3 13 x|y x y
share
|
improve this answer
|
follow
...
Android: TextView automatically truncate and replace last 3 char of String
...tement about horizontal scrolling .... check it out. It at least works on v2.2.
share
|
improve this answer
|
follow
|
...
How to empty a redis database?
...
@AlexNaspo if you're using v2.8+, a combo of SCAN and DEL would do the trick nicely. See here for a bash script that does it: stackoverflow.com/a/23399125/3160475
– Itamar Haber
Nov 11 '14 at 9:09
...
Where can I get a list of Ansible pre-defined variables?
... The template trick in the post above by Enno errors out for me on v2.2.1. The list you provided under 2 had what I needed, was just hard to find manually. Thanks!
– ahamilton9
Feb 15 '17 at 20:05
...
Adding local .aar files to Gradle build using “flatDirs” is not working
...ith below specifications
Android Studio v1.3
gradle plugin v1.2.3
Gradle v2.4
What works now
Now you can import a local aar file via the File>New>New
Module>Import .JAR/.AAR Package option in Android Studio v1.3
However the below answer holds true and effective irrespective of the An...
psycopg2: insert multiple rows with one query
...s import execute_values
execute_values(cur,
"INSERT INTO test (id, v1, v2) VALUES %s",
[(1, 2, 3), (4, 5, 6), (7, 8, 9)])
Previous Answer:
To insert multiple rows, using the multirow VALUES syntax with execute() is about 10x faster than using psycopg2 executemany(). Indeed, executemany(...
Convert pem key to ssh-rsa format
...A pair
in PEM format:
openssl rsa -in dummy-xxx.pem -pubout
in OpenSSH v2 format see:
ssh-keygen -y -f dummy-xxx.pem
Notes
OS and software version:
[user@test1 ~]# cat /etc/redhat-release ; uname -a ; openssl version
CentOS release 6.5 (Final)
Linux test1.example.local 2.6.32-431.el6.x86_6...
What is the convention for word separator in Java package names?
...e, or login names.
Examples
com.sun.eng
com.apple.quicktime.v2
edu.cmu.cs.bovik.cheese
References
java.sun.com - Code Conventions/Naming
Note that in particular, anything following the top-level domain prefix isn't specified by the above document. The JLS also agrees with...
Difference between “git add -A” and “git add .”
...
I don't think this is correct. Using git v2.10.windows.2 'git add' returns 'Nothing specified, nothing added'. 'git add -A' adds all changed files. Which suggests '-A' is not the default.
– Neutrino
Oct 5 '17 at 12:47
...
How can I do string interpolation in JavaScript?
...them simply as
> `foo
... bar`
'foo\n bar'
Note: I used io.js v2.4.0 to evaluate all the template strings shown above. You can also use the latest Chrome to test the above shown examples.
Note: ES6 Specifications are now finalized, but have yet to be implemented by all major browsers. ...