Defining a function with one variable in Mathematica, is by : f[x_].
How do I write a function for more variables?
You can use the comma "," separator:
f[x_Integer, y_Integer]
Here there are more examples to make functions with default option, or some especial type, etc.
Related
What means mixed type in Laravel documentation? Does it mean that function accepts parameters of different type?
For example, I was looking at bcc function to check if I could pass array of strings as a parameter, because currently I am passing only a single string, which is not inside an array.
mixed technically means any type of variable. It is often used when more than one type of variable can be used. In your specific case, there is a big chance you can use a single or an array.
https://wiki.php.net/rfc/mixed-typehint
I have a user defined variable that contains several elements:
a,b,c,d,e,f
Is it possible to use the lenght of the above 'array' to pass as Number of Threads?
I tried using a beanshell function like this:
${__BeanShell(vars.get("users_username").split(",").length,)} but it does not seem to work.
As per JMeter Functions documentation
If a function parameter contains a comma, then be sure to escape this with "\", otherwise JMeter will treat it as a parameter delimiter
Since JMeter 3.1 it is recommended to use __groovy() function instead of other scripting options/languages mainly because Groovy performance is much better than alternatives
Assuming all above you can dynamically define the number of threads as:
${__groovy(vars.get("users_username").split("\,").length,)}
I am trying to figure if this is a syntax or logic problem with bash.
It you can return a value from a function and assign it to a variable like;
var=$(the_function)
I am trying to add multiple arguments to the function call that include variables, paren (), double colon ::, along with both single and double quotes with no luck.
an example of what i am trying is the following;
var=$(db_query "SELECT nextval('the_seq'::regclass) FROM the_table;" "$dbname")
the function successfully queries the database when not trying to return the value.
I keep getting an "unexpected `)'" for the very last ) that wraps the entire function. I have tried numerous forms of quoting and escaping but take away var=$ along with the wrapping ( ) and the function works as intended.
Would this be my incorrect logic, syntax or both?
try:
var="$(the_function parm1 parm2)"
or:
var="`the_function parm1 parm2`"
I've encountered a problem in my bash script.
I need to assign new variables according to files in my folder and assign them a number according to the amount of arguments the script gets (whether it's a script or not).
I'm trying to get a script written like this:
n_${array[*]}=`arg_count ${array[*]}`
while arg_count checks how many parameters a script gets.
for further use, I'm going to change those variables if there's a function with different arguments needed.
Thanks in advance!
In general, you can use the declare builtin to accomplish this, because it is a command whose argument is a string that resembles an assignment.
declare "n_${array[*]}=$(arg_count ${array[*]})"
However, note that unless you set IFS appropriately and the array contents are amenable, the expansion of ${array[*]} isn't going to be a string that forms part of a valid identifier.
You probably want to either use an associative array,
declare -A n
n[${array[*]}]=$(arg_count ${array[*]})
or write your code in a programming language that properly supports data structures.
I am trying to add 2 variable together inside of an assign. When reading the Smarty Assign Documentation it says:
This complex example must have the variables in backticks, what does this mean?
It is the following sign `
So you have
assign variable = `value`
According to the official Smarty documentation,
Smarty will recognize assigned variables embedded in "double quotes" so long as the variable name contains only numbers, letters, under_scores and brackets[].
With any other characters, for example a .period or $object->reference, then the variable must be surrounded by `backticks`.
In particular, if you are doing maths in, say, an assign, you need to use backticks for it to work.
backticks are only necessary when inside quotes, and when you have variables with characters such as . -> example:
{assign var="foo" value="myval is `$smarty.request.myval`"}