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How do I write a bash script to restart a process if it dies?
...ed the process that monitors your process to be the process' parent. What does this mean? It means only the process that starts your process can reliably wait for it to end. In bash, this is absolutely trivial.
until myserver; do
echo "Server 'myserver' crashed with exit code $?. Respawning...
How do I mock an open used in a with statement (using the Mock framework in Python)?
How do I test the following code with unittest.mock :
8 Answers
8
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How do you compare structs for equality in C?
How do you compare two instances of structs for equality in standard C?
11 Answers
11
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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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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...
What to do Regular expression pattern doesn't match anywhere in string?
...
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...
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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