Class Mid
java.lang.Object
com.singularsys.jep.functions.PostfixMathCommand
com.singularsys.jep.functions.NaryFunction
com.singularsys.jep.functions.strings.Mid
- All Implemented Interfaces:
PostfixMathCommandI
,Serializable
Extract substring of first argument:
mid("abcdefg",2,3) -> "cde"
Syntax: mid(str,start,len)
Second argument is starting index, with the first character being at index 0.
Third argument is number of characters to return.
Note this differs from Excel's mid
function which has 1 as the index of the first character.
- If
start
is greater than the length of the string an EvaluationException is thrown. - If
start
is less than zero an EvaluationException is thrown. - If
len
is less than zero an EvaluationException is thrown. - If
start+len
is greater than the length of the string return all characters from start. - If
str
is not a string an EvaluationException is thrown. - If
start
is not a number representing an integer an EvaluationException is thrown. - If
end
is not a number representing an integer an EvaluationException is thrown.
- See Also:
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Field Summary
Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand
curNumberOfParameters, name, NaN, numberOfParameters
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Constructor Summary
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Method Summary
Methods inherited from class com.singularsys.jep.functions.NaryFunction
run
Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand
asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, checkNumberOfParameters, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString, toString
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Constructor Details
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Mid
public Mid()
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Method Details
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eval
Description copied from class:NaryFunction
Evaluate the function- Specified by:
eval
in classNaryFunction
- Parameters:
args
- arguments to the function- Returns:
- value returned by the function
- Throws:
EvaluationException
- if the calculation cannot be performed
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