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How to add a progress bar to a shell script?
...ning of the line without writing \n to the terminal.
Write \n when you're done to advance the line.
Use echo -ne to:
not print \n and
to recognize escape sequences like \r.
Here's a demo:
echo -ne '##### (33%)\r'
sleep 1
echo -ne '############# (66%)\r'
sleep 1...
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 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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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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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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How do I do top 1 in Oracle?
How do I do the following?
9 Answers
9
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Convert a list of data frames into one data frame
...
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 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...
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...
Test if string is a number in Ruby on Rails
...
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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