This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
Get back the output of os.execute in Lua
I want to assign the result of a shell command to a lua variable.
Any better way in lua 5.1 than what is answered here?
Get back the output of os.execute in Lua
You can use io.popen for this (included in Lua 5.1). That gives you a file handle which you can use to either write or read from (to) the program. More info in the Lua Manual.
Related
This question already has answers here:
What does the '-' (dash) after variable names do here?
(3 answers)
Usage of :- (colon dash) in bash
(2 answers)
Closed 2 years ago.
ENV=${deploy-qa}
echo $ENV
qa
Relatively new to bash and I'm trying to set up a pipeline that switched based off the ending of a string and accidentally stumbled across this. I'm unsure how this actually returns 'qa' though. This is what I was looking to do, but I'd like to understand what's actually happening. I dont understand whats causing the 'deploy-' bit to drop off.
This question already has answers here:
Difference between http.Handle and http.HandleFunc?
(4 answers)
Closed 5 years ago.
I'm trying to understand the differences between Handle and HandleFunc.
Other than the differences, when would you use one over the other when building a Go web app?
https://golang.org/pkg/net/http/#Handle
You'd use whichever one fits your handler implementation. If you've implemented your handler as a function, you'd use HandleFunc; if you've implemented it as a type with a ServeHTTP method, you'd use Handle.
This question already has answers here:
VBScript to read specific line and extract characters and store it as a variable
(2 answers)
How to delete the first row in the .csv file
(2 answers)
Closed 5 years ago.
I want to read a specific line from the text file using VBScript.
I have explored Read and ReadLine methods but I can't able to read only specific line from text file. (I have 1000 of line but I want to read only 99 or 200 or 500 line only)
The question may be similar to the questions those duplicate hunters pointed to, but the answers are - for different reasons - of no use. A good answer could be build from one answer to the completely different question here.
Now to the answer:
Use a .SkipLine loop to read to the line before you are interested in and get it using .ReadLine.
This question already has answers here:
How to do a mass rename?
(11 answers)
Closed 9 years ago.
I have to change
<<STORE>>SA_MASTER_YYYMMDDHHMMSS.dat file name to
SA_MASTERYYYMMDDHHMMSS.<<STORE>>. Please tell me the command in unix to achieve this
for example
0001.SAMASTER_YYYYMMDDHHMMSS.DAT should be changed to SAMASTER_YYYYMMDDHHMMSS.1 ie if the store has leading zero(0001) i have to eliminate the zeros(1)
use mv.
e.G. mv 0001.SAMASTER_YYYYMMDDHHMMSS.DAT SAMASTER_YYYYMMDDHHMMSS.1
For the interpretation you will need to write some script.
See How to do a mass rename? for further answers.
Of course, the direct method is using mv. However, if you want to rename a lot of files' names, you need write a program, you need sed,cut and so on
This question already has answers here:
Closed 12 years ago.
Possible Duplicate:
When do you use the “this” keyword?
In OOP sometimes we can write this.PropertyName = VALUE and sometimes we can skip this. and just write PropertyName = VALUE.
My questions:
Should we try always to use this.?
Does using / writing this have any effect on application performance or does it just make the code a little bit clearer?
There shouldn't be any difference in performance. Its purely a style decision.