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Rails respond_with: how does it work?
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Update for Rails 4.2+
#respond_with and ::respond_to (n.b. class method) are no longer a part of Rails. They were migrated into the third-party responders gem as of Rails 4.2 (release notes / commit dated Aug 2014). While responders is not i...
Script parameters in Bash
... ocrscript.sh
$1 # -from
$2 # /home/kristoffer/test.png
$3 # -to
$4 # /home/kristoffer/test.txt
It might be easier to omit the -from and the -to, like:
ocrscript.sh /home/kristoffer/test.png /home/kristoffer/test.txt
Then you'll have:
$1 # /home/kristoffer/test.png
$2 # /home...
How to drop columns by name in a data frame
... function. For example :
R> df <- data.frame(x=1:5, y=2:6, z=3:7, u=4:8)
R> df
x y z u
1 1 2 3 4
2 2 3 4 5
3 3 4 5 6
4 4 5 6 7
5 5 6 7 8
Then you can use the which function and the - operator in column indexation :
R> df[ , -which(names(df) %in% c("z","u"))]
x y
1 1 2
2 2 3
3 3 4...
Compute a confidence interval from sample data
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4 Answers
4
Active
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Do I need a content-type header for HTTP GET requests?
...ipient MAY either assume a media type of "application/octet-stream" ([RFC2046], Section 4.5.1) or examine the data to determine its type.
It means that the Content-Type HTTP header should be set only for PUT and POST requests.
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Get Base64 encode file-data from Input Form
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The easy way:
The readAsDataURL() method might already encode it as base64 for you. You'll probably need to strip out the beginning stuff (up to the first ,), but that's no biggie. This would take all the fun out though.
The hard way:
If you want to try it the hard way (or it doesn't work), look...
Can I change the root EBS device of my amazon EC2 instance?
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edited Apr 24 '17 at 18:52
cfstras
84955 silver badges1818 bronze badges
answered Jun 16 '...
How do I reference an existing branch from an issue in GitHub?
...tHub:
References
Certain references are auto-linked:
SHA: be6a8cc1c1ecfe9489fb51e4869af15a13fc2cd2
User@SHA ref: mojombo@be6a8cc1c1ecfe9489fb51e4869af15a13fc2cd2
User/Project@SHA: mojombo/god@be6a8cc1c1ecfe9489fb51e4869af15a13fc2cd2
#Num: #1
User/#Num: mojombo#1
User/Project#Num: mojombo/god#1
I...
Automatically plot different colored lines
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edited Jun 22 '12 at 20:43
gnovice
122k1414 gold badges245245 silver badges350350 bronze badges
answer...
After array_filter(), how can I reset the keys to go in numerical order starting at 0
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4 Answers
4
Active
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