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What is unit testing and how do you do it? [duplicate]
...ons
And many more ...
Also, Google for site:stackoverflow.com "how do you" unit-test
7 Answers
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Convert a list of data frames into one data frame
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This is a little slower than the original:
> system.time({ df <- do.call("rbind", listOfDataFrames) })
user system elapsed
0.25 0.00 0.25
> system.time({ df2 <- ldply(listOfDataFrames, data.frame) })
user system elapsed
0.30 0.00 0.29
> identical(df, d...
How do I do top 1 in Oracle?
How do I do the following?
9 Answers
9
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What to do Regular expression pattern doesn't match anywhere in string?
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Contrary to all the answers here, for what you're trying to do regex is a perfectly valid solution. This is because you are NOT trying to match balanced tags-- THAT would be impossible with regex! But you are only matching what's in one tag, and that's perfectly regular.
Here's the p...
How do I run a rake task from Capistrano?
...our \config\deploy.rb, add outside any task or namespace:
namespace :rake do
desc "Run a task on a remote server."
# run like: cap staging rake:invoke task=a_certain_task
task :invoke do
run("cd #{deploy_to}/current; /usr/bin/env rake #{ENV['task']} RAILS_ENV=#{rails_env}")
en...
How do I use 'git reset --hard HEAD' to revert to a previous commit? [duplicate]
...t's not really "tracking changes" to your files. (for example, even if you do git add to stage a new version of the file, that overwrites the previously staged version of that file in the staging area.)
In your question you then go on to ask the following:
When I want to revert to a previous co...
Test if string is a number in Ruby on Rails
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There is no to_f in the above, and Float() doesn't exhibit that behavior: Float("330.346.11") raises ArgumentError: invalid value for Float(): "330.346.11"
– Jakob S
Nov 3 '11 at 10:29
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Re-doing a reverted merge in Git
...8s in Git, that I merged in the general develop branch. Turns out I had done it too fast, so I used git-revert to undo the merge. Now, however, the time has come to merge 28s into develop , but git-merge command sees the original merge, and happily announces that all is well and branches have ...
How to fetch all Git branches
...oned a Git repository, which contains about five branches. However, when I do git branch I only see one of them:
31 Answe...
How do I use Ruby for shell scripting?
I have some simple shell scripting tasks that I want to do
13 Answers
13
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