Questions tagged [positional-parameter]
104 questions
284
votes
7 answers
What is the difference between named and positional parameters in Dart?
Dart supports both named optional parameters and positional optional parameters. What are the differences between the two?
Also, how can you tell if an optional parameter was actually specified?
Seth Ladd
- 112,095
- 66
- 196
- 279
20
votes
3 answers
Assigning to a positional parameter
How can I assign a value to a positional parameter in Bash? I want to assign a value to a default parameter:
if [ -z "$4" ]; then
4=$3
fi
Indicating that 4 is not a command.
Freeman
- 5,810
- 3
- 47
- 48
14
votes
1 answer
python SyntaxError: positional argument follows keyword argument
I have a python 3 function which is defined like below:
def hidden_markov_model(distribution, K=3, N=100, *args):
when i call the function, i get this error:
Q_hmm = hidden_markov_model(Gaussian, K=K, N=N,
mu,…
Atena
- 471
- 1
- 6
- 18
8
votes
1 answer
define Julia functions with optional positional arguments
From this link, it says:
# You can define functions with optional positional arguments
function defaults(a,b,x=5,y=6)
return "$a $b and $x $y"
end
defaults('h','g') # => "h g and 5 6"
defaults('h','g','j') # => "h g and j…
lanselibai
- 1,203
- 2
- 19
- 35
7
votes
1 answer
Positional Parameter error in powershell script
I was trying to install/update EPO agent through PowerShell, but I am getting below error.
I am new to PowerShell so I am not able to see what is causing this.
Below is the script I used to update the agent :
Start-Process -FilePath $scriptpath…
Gopi
- 619
- 2
- 9
- 27
5
votes
2 answers
Using a loop's positional parameters inside an inner loop in Raku
Here is the code:
my @s=;
for @s.kv {
for ($^k ... @s.elems) {
printf("%s ", $^v);
}
printf("\n");
}
Expected output is:
# a b c d
# b c d
# c d
# d
But it gives this error (possibly among others)
key 0, val 1 Too few…
Lars Malmsteen
- 738
- 4
- 23
5
votes
1 answer
How can I get argparse to recognize a positional argument which follows a variable length optional argument?
I am writing a script that will be used to merge several input files, generating a single output file, and I want to build a small command line interface using argparse. To me, the most natural-seeming way to do it would be to have a single…
stachyra
- 4,423
- 4
- 20
- 34
3
votes
1 answer
How To Set Positional Arguments in Jenkins Groovy
Does Groovy support positional arguments?
I have a function defined in a Jenkins shared library name.groovy
def call(name, age) {
sh """
echo "My name is: ${name}"
echo "My age is: ${age}"
"""
}
And when I call it from the pipeline
stage ('Shared…
Metro
- 873
- 8
- 19
3
votes
1 answer
completion Candidates for positional parameter in picocli
I'm trying to provide completion for positional parameters.
Somewhere I found note that they are not very well supported, but currently I'm not able to find exact place in spec and I'm not sure what that really means.
In meantime I found…
zimi
- 1,586
- 12
- 27
3
votes
1 answer
"$1" is empty when running bash -c scriptname arg
I was trying to develop a simple bash script where one positional parameter is used. But for no reason the parameter is empty. The bash script is given bellow.
#!/bin/bash
ulimit -s hard
if [ "$1" != "" ]; then
echo "Positional parameter 1…
C M Khaled Saifullah
- 164
- 3
- 13
3
votes
3 answers
Python calling out positional argument
I have a python function (python 2.5) with a definition like:
def Foo(a, b='Silly', c='Walks', d='Spam', e='Eggs', f='Ni', *addl):
Where addl can be any number of strings (filenames) to do something with.
I'm fine with all of the defaults, but I…
MellowNello
- 53
- 5
2
votes
1 answer
Function Parameter Position suddenly acting weird
Code:
This example illustrates what I mean:
Function test{
param(
[parameter(Position = 0, ValueFromPipeline)]
[string]$Param0,
[parameter(Position = 1)]
[ArgumentCompletions("Param1_Opt1", "Param1_Opt2")]
[Array]$Param1 =…
GaryAtlan82
- 55
- 4
2
votes
1 answer
How to replace each delimiter in an arbitrary number of command-line arguments that are all delimited name-value pairs?
How to change a command line argument in Bash? explains how to modify input arguments in bash.
But in my case, I have a dynamic set of input arguments. I don't know how many are there.
This is my command:
send url key1=value1 key2=value2…
Mohammad Miras
- 143
- 1
- 9
2
votes
1 answer
How to make argparse treat all arguments as positional?
How can I make an argparse parser treat all arguments as positional, even the ones that look like options? For example, with this definition:
parser.add_argument('cmd', nargs='*', help='The command to run')
I want to be able to run
prog.py mycomand…
planetp
- 14,248
- 20
- 86
- 160
2
votes
1 answer
How to pass positional arguments to an interactive bash session
I wanted to start an interactive bash shell like this :
bash (...some options) 1 2 3
so that in the shell session, I have $1=1, ...
I didn't find any options to achieve the effect.
I tried this, thought it might work :
bash -c bash _ 1 2 3
but it…
Philippe
- 20,025
- 2
- 23
- 32