In programming, a dynamic variable is a variable whose address is determined when the program is run. In contrast, a static variable has memory reserved for it at compilation time.
Questions tagged [dynamic-variables]
262 questions
2
votes
1 answer
How to dynamically or pre-generate ansible variables from an existing file in a specific format for AWS ECS
I have a simple playbook which creates ECS Taskdefinition.
example:
#variable file, vars.yml
---
containers:
- name: nash-test
essential: true
image: nash-test
memory: 256
portMappings:
- containerPort: 8080
hostPort: 80
protocol:…
nash
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- 1
2
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1 answer
How dynamic variables implemented for Node.JS in C++
First, i'm a beginner in C/C++, be mercyful.
In Node.JS, all variables are dynamic and we can cast the variable any type. So, Node.JS writed with C++ and in C++ or C there is no dynamic variables. So how dynamic variables implemented?
In JS:
var…
Ibrahim Ipek
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votes
5 answers
Is it a good idea to dynamically create variables?
I recently found out how to dynamically create variables in python through this method:
vars()['my_variable'] = 'Some Value'
Thus creating the variable my_variable.
My question is, is this a good idea? Or should I always declare the variables…
Mark Skelton
- 3,663
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2
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2 answers
Batch - Evaluating dynamic variables with parameter in name
I am writing a batch library that must not be local, so that external batch files may call upon the functions from a single defined location.
This requires that the calling batch file must pass in a "unique" identifier for the variables named…
Ryan
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votes
1 answer
Dynamic variable assignment in pure shell without using eval
Is there a way to assign arbitrary values to dynamically named variables in pure shell (i.e. sh, not bash) without using eval?
I would like to know if there was a way to avoid using eval as it can allow for arbitrary code execution.
let seems only…
rhlee
- 3,857
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2
votes
2 answers
Dynamically Assign Variables in Matlab
I have the following function as part of a large codebase, which I inherited:
function = save_function(fpath, a,b,c)
save(fpath, 'a', 'b', 'c')
end
This function is called at the end of one script, before another script is to be executed. This…
inspectorG4dget
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2 answers
Sending dynamic variables to SASS
I am currently working in a new project that allows users to change the appearance of the website base on their likes. They could change background colors and stuff, which get saved on a database for later use or they could be stored in a cookie.…
lomas09
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2
votes
3 answers
Dictionary use instead of dynamic variable names in Python
I have a long text file having truck configurations. In each line some properties of a truck is listed as a string. Each property has its own fixed width space in the string, such as:
2 chracters = number of axles
2 characters = weight of the first…
marillion
- 10,618
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2
votes
1 answer
Perl variable value as another variable name
I have a perl script (abc.pl) and 2 config files (one var.pl and one config.txt)
Now
in var.pl
$admin_userid = "admin";
$guest_userid = "guest";
in config.txt - this has the value of user - can be either admin or guest
user=admin/guest
in…
Avinash Sonee
- 1,701
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1
vote
2 answers
PHP: Is it possible to dynamically change the name of a variable?
I have code which selects data from my database and then sets these selected values to a variable.
However I need to run the query many times. I am wondering if I could use a while/for loop to run the query the x number of times and use a switch…
NeverPhased
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1
vote
1 answer
How to assign a value to a variable with a dynamically created name?
I know this is a no-no...and yes, I still want to do it or at least know how to do it. I would like to set the value of a variable in Perl for which the name is dynamically created (I am looping through different arrays of strings). I know I could…
gj.
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vote
1 answer
Globalization of dynamic variables in wso2 Integration Studio
I've so far been using variables by saving them in a local entry file, and then using $ctx to call them and use them in my proxy. I want to know if there's a way in wso2 Integration studio wherein I can create multiple global variables (eg; to save…
ahinsa
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vote
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What is the simplest way to compute the average of one variable grouped by a second variable, iterating over all second variables dplyr?
I have a data frame with a large number of variables, one of them, the probability of death to be predicted by all others.
As a preliminary step I want to compute the PoD by counting the death rate in bins of each variable.
let's say df <- (age =…
sSoGah
- 15
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1
vote
1 answer
Create a reactive variable depending on active Tab on R Shiny
I have this simple app and I would like to be able to "catch" the active tab.
For example, if I'm on "tab1", my selectInput at the top would be c("a","b","c") but it would change if I am on the other tab
I want to create a variable active_tab that…
K.Hua
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vote
2 answers
How to create a dynamic Javascript Variable from a PHP String
How can I create a dynamic Javascript variable using a PHP String?
This approach doesn't work. How should I fix it to make it work?