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What is the most efficient way to store a list in the Django models?
... edited Feb 17 '17 at 13:19
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answered Jul 10 '09 at 15:23
Andrew HareAndrew H...
Renew Provisioning Profile
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For a company that is famous for intuitiveness (if that's a word) this is extremely hidden and obscure. Worked for me, it did also prompt me something else relating to the provisioning profile and asked if xcode should fetch it for...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...implement multitouch: Rotation Detector
Xinyue Deng dengxinyue0420@gmail.com
DRAFT (March 6, 2016): Building extensions requires the App Inventor extensions capability, which is not yet incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the Rot...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...implement multitouch: Rotation Detector
Xinyue Deng dengxinyue0420@gmail.com
DRAFT (March 6, 2016): Building extensions requires the App Inventor extensions capability, which is not yet incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the Rot...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...implement multitouch: Rotation Detector
Xinyue Deng dengxinyue0420@gmail.com
DRAFT (March 6, 2016): Building extensions requires the App Inventor extensions capability, which is not yet incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the Rot...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...implement multitouch: Rotation Detector
Xinyue Deng dengxinyue0420@gmail.com
DRAFT (March 6, 2016): Building extensions requires the App Inventor extensions capability, which is not yet incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the Rot...
what is the difference between a portlet and a servlet?
...Portlets are part of JSR-168 standard that regulates portal containers and components. This is different standard from standards for web containers (and servlets). Though there are definitely strong parallels between these two standards they differ in containers, APIs, life cycle, configuration, dep...
dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
...c(rep(c("A","B"), 50), rep(c("B","C"), each=25))
# Empty groups involving combinations of Species and group2 are not included in output
iris %>% group_by(Species, group2, .drop=FALSE) %>% tally
#> Species group2 n
#> 1 setosa A 25
#> 2 setosa B 25...
Boolean operators && and ||
...f.
The functions all and any are often used on the result of a vectorized comparison to see if all or any of the comparisons are true, respectively. The results from these functions are sure to be length 1 so they are appropriate for use in if clauses, while the results from the vectorized comparis...