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What's the fastest way to merge/join data.frames in R?
...bases as well.
library(plyr)
library(data.table)
library(sqldf)
set.seed(123)
N <- 1e5
d1 <- data.frame(x=sample(N,N), y1=rnorm(N))
d2 <- data.frame(x=sample(N,N), y2=rnorm(N))
g1 <- sample(1:1000, N, replace = TRUE)
g2<- sample(1:1000, N, replace = TRUE)
d <- data.frame(d1, g1,...
When and why I should use session_regenerate_id()?
...ransitions.
Further reading:
http://php.net/session_regenerate_id
https://www.owasp.org/index.php/Session_fixation
http://en.wikipedia.org/wiki/Session_fixation
https://wiki.php.net/rfc/precise_session_management
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How to create a new (and empty!) “root” branch?
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Update multiple columns in SQL
...
I tried with this way and its working fine :
UPDATE
Emp
SET
ID = 123,
Name = 'Peter'
FROM
Table_Name
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Splitting string into multiple rows in Oracle
...
Also, may use DBMS_UTILITY.comma_to_table & table_to_comma:
http://www.oracle-base.com/articles/9i/useful-procedures-and-functions-9i.php#DBMS_UTILITY.comma_to_table
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How to display count of notifications in app launcher icon [duplicate]
...get instead of an icon. Widgets are customisable. Please read this :http://www.cnet.com/8301-19736_1-10278814-251.html and this http://developer.android.com/guide/topics/appwidgets/index.html.
Also look here: https://github.com/jgilfelt/android-viewbadger. It can help you.
As for badge numbers. As I...
How to break/exit from a each() function in JQuery? [duplicate]
...
123
You can use return false;
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数据存储组件 · App Inventor 2 中文网
...文文档。2个网站体验差不多，网站如下：
https://tinywebdb.cn/ 经测试，单个键值的容量大小约为 64KB 字节，超过则会保存失败。
https://tinywebdb.appinventor.space/ 经测试，单个键值的容量大小约为 9000 字节（9KB），超过则会保存失...
How can I check if character in a string is a letter? (Python)
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Effect of a Bitwise Operator on a Boolean in Java
...th=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4...