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5.6. Expressions
SystemTap supports a number of operators that use the same general syntax, semantics, and precedence as in C and awk. Arithmetic is performed per C rules for signed integers. If the parser detects division by zero or an overflow, it generates an error. The following subsections list these operators.
5.6.4. String assignment operators
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= .=
5.6.11. in
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This expression evaluates to true if the array contains an element with the specified index.
5.6.12. [ , … ] in
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The number of index values must match the number of indexes previously specified.
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