How do you pass a variable to the curl command?

How do you pass a variable to the curl command?

Three ways to pass the environment variables

1. 1 Add a single quote and a double quote around the variable. $ curl -X POST https://requestbin.io/1bk0un41 -H “Content-Type: application/json” -d ‘{ “property1″:”‘”$TERM”‘”, “property2″:”value2” }’
2. 2 Escaping double quote.
3. 3 Use a data generation function.

How do you use variable substitution in SAP PI?

Variable Substitution Configuration Steps.

1. Step 1 – Find the Variable in the Target Message Type. First find the element in the target structure which you need to assign to the file name.
2. Step 2 – Activate Variable Substitution in Receiver Communication Channel.

How do I use EXPR in Tcl?

A Tcl expression consists of a combination of operands, operators, and parentheses. White space may be used between the operands and operators and parentheses; it is ignored by the expression processor. Where possible, operands are interpreted as integer values.

How to substituting a string into a variable?

If pattern begins with %, it must match at the end of the expanded value of parameter. If string is null, matches of pattern are deleted and the / following pattern may be omitted. If parameter is @ or *, the substitution operation is applied to each positional parameter in turn, and the expansion is the resultant list.

When to use a command substitution in Bash?

If you use the command substitution in any other context, such as export DIRNAME=$ (dirname “$FILE”) or du $ (dirname “$FILE”), the lack of quotes will cause trouble if the result of the expansion contain whitespace or globbing characters. DIRNAME=”$ (dirname “$FILE”)” is the recommended way.

What do you need to know about variable substitution in PowerShell?

PowerShell allows you to do command execution inside the string with a special syntax. This allows us to get the properties of these objects and run any other command to get a value.

How to substitute a string for a parameter in Bash?

From the bash documentation: $ {parameter/pattern/string} Pattern substitution. The pattern is expanded to produce a pattern just as in pathname expansion. Parameter is expanded and the longest match of pattern against its value is replaced with string.