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Replacing NAs with latest non-NA value
...
x = c(NA,NA,'a',NA,NA,NA,NA,NA,NA,NA,NA,'b','c','d',NA,NA,NA,NA,NA,'e')
xx = rep(x, 1000000)
system.time({ yzoo = na.locf(xx,na.rm=F)})
## user system elapsed
## 2.754 0.667 3.406
system.time({ yrep = repeat.before(xx)})
## user system elapsed
## 0.597 0.199 0.793
Ed...
Which MySQL datatype to use for an IP address? [duplicate]
...address in $_SERVER['REMOTE_ADDR']. And how could I convert something like xxx.xx.xx.xxx into an integer (4 bytes) like you said?
– ComFreek
Feb 27 '11 at 14:00
...
Team Build Error: The Path … is already mapped to workspace
...am Foundation Version Control Tool (tf).
You can get a list of all workspaces by bringing up a Visual Studio Command Prompt then changing to your workspace folder and issuing the following commands:
C:\YourWorkspaceFolder>tf workspaces /owner:*
You should see your problem workspace in the lis...
What does multicore assembly language look like?
... Broadcast INIT IPI to all APs
; 10-millisecond delay loop.
MOV EAX, 000C46XXH ; Load ICR encoding for broadcast SIPI IP
; to all APs into EAX, where xx is the vector computed in step 10.
MOV [ESI], EAX ; Broadcast SIPI IPI to all APs
; 200-microsecond delay loop
MOV [ESI],...
国内最美旅游景点TOP10 总有一处让你心动 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...症，且还都无药可医。各位爱旅行的小伙伴们，小编为你搜索了国内最美风景的10个胜地，秒...长假已经走了，听说大伙居然都患上了不同程度的“节后症”，且还都无药可医。各位爱旅行的小伙伴们，小编为你搜索了国内最美...
HTTP response code for POST when resource already exists
...(server or client or both)
If server just point the duplicate, look at 4xx:
400 Bad Request - when the server will not process a request because it's obvious client fault
409 Conflict - if the server will not process a request, but the reason for that is not the client's fault
...
For implic...
How do I use itertools.groupby()?
...roupby - when the keys are not sorted. In the following example, items in xx are grouped by values in yy. In this case, one set of zeros is output first, followed by a set of ones, followed again by a set of zeros.
xx = range(10)
yy = [0, 0, 0, 1, 1, 1, 0, 0, 0, 0]
for group in itertools.groupby(...
各编程语言读写文件汇总 - C/C++ - 清泛网 - 专注C/C++及内核技术
...中难免会有遗忘，有时又难以翻看自己写过的代码，网上搜索更是五花八门让人头大，鉴于此，清泛网 读写文件本来是非常基础的代码，但工作学习中难免会有遗忘，有时又难以翻看自己写过的代码，网上搜索更是五花八门让...
When is a Java method name too long? [closed]
... to Tx, which gets you to getNumberOfEligibleItemsInTx.
Or if the method accepts a param of type Transaction you can drop the InTx altogether: getNumberOfEligibleItems
You change numberOf by count: getEligibleItemsCount
Now that is very reasonable. And it is 60% shorter.
...
File content into unix variable with newlines
...to IFS (Internal Field Separator) variable which contains newline.
$ cat xx1
1
2
$ A=`cat xx1`
$ echo $A
1 2
$ echo "|$IFS|"
|
|
A workaround is to reset IFS to not contain the newline, temporarily:
$ IFSBAK=$IFS
$ IFS=" "
$ A=`cat xx1` # Can use $() as well
$ echo $A
1
2
$ IFS=$IFSBAK...