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Turning multi-line string into single comma-separated
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You can use awk and sed:
awk -vORS=, '{ print $2 }' file.txt | sed 's/,$/\n/'
Or if you want to use a pipe:
echo "data" | awk -vORS=, '{ print $2 }' | sed 's/,$/\n/'
To break it down:
awk is great at handling data broken down into fields
-vORS=, sets the "output record separa...
cannot download, $GOPATH not set
...icial Go site discusses GOPATH and how to lay out a workspace directory.
export GOPATH="$HOME/your-workspace-dir/" -- run it in your shell, then add it to ~/.bashrc or equivalent so it will be set for you in the future. Go will install packages under src/, bin/, and pkg/, subdirectories there. You'...
Reverse engineering from an APK file to a project
...which I transferred to my phone. Is there a way to reverse the process of exporting an application to the .apk file, so I can get my project back?
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Difference between Covariance & Contra-variance
...types are said to be "assignment compatible". Let's write "a value of type X can be assigned to a variable of type Y" in a shorter form: X ⇒ Y. Notice that this is a "fat arrow".
So in our first subset, here are all the assignment compatibility relationships:
Tiger ⇒ Tiger
Tiger ⇒ Animal
A...
What's the nearest substitute for a function pointer in Java?
...od that's about ten lines of code. I want to create more methods that do exactly the same thing, except for a small calculation that's going to change one line of code. This is a perfect application for passing in a function pointer to replace that one line, but Java doesn't have function pointers...
Just what is an IntPtr exactly?
...simply put null or IntPtr.Zero and found most functions to work. What exactly is it and when/why is it used?
8 Answers
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Reference: What is variable scope, which variables are accessible from where and what are “undefined
...ple: PHP has function scope. That's the only kind of scope separator that exists in PHP. Variables inside a function are only available inside that function. Variables outside of functions are available anywhere outside of functions, but not inside any function. This means there's one special scope ...
What are the differences between LDAP and Active Directory?
...swered Mar 19 '09 at 18:26
JohnFxJohnFx
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Mark parameters as NOT nullable in C#/.NET?
...null isn't being used anywhere for it and at run-time throw ArgumentNullException .
6 Answers
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How to schedule a function to run every hour on Flask?
...roundScheduler() from APScheduler package (v3.5.3):
import time
import atexit
from apscheduler.schedulers.background import BackgroundScheduler
def print_date_time():
print(time.strftime("%A, %d. %B %Y %I:%M:%S %p"))
scheduler = BackgroundScheduler()
scheduler.add_job(func=print_date_time,...