Introspection: Difference between revisions
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(New page: This task asks to <ul> <li> verify the version/revision/patchlevel of you currently running (compiler/interpreter/byte-compiler/runtime environment/whatever your language uses) and exit if...) |
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{{task}} |
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This task asks to <ul> |
This task asks to <ul> |
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<li> verify the version/revision |
<li> verify the version/revision of your currently running (compiler/interpreter/byte-compiler/runtime environment/whatever your language uses) and exit if it is too old. |
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<li> check whether the variable "bloop" exists and whether the math-function "abs()" is available and if yes compute <i>abs(bloop)</i>. |
<li> check whether the variable "bloop" exists and whether the math-function "abs()" is available and if yes compute <i>abs(bloop)</i>. |
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</ul> |
</ul> |
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==[[Tcl]]== |
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[[Category:Tcl]] |
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package require Tcl 8.2 ; # throws an error if older |
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if {[info exists bloop] && [llength [info functions abs]]} { |
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puts [expr abs($bloop)] |
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} |
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Revision as of 00:16, 15 March 2007
You are encouraged to solve this task according to the task description, using any language you may know.
This task asks to
- verify the version/revision of your currently running (compiler/interpreter/byte-compiler/runtime environment/whatever your language uses) and exit if it is too old.
- check whether the variable "bloop" exists and whether the math-function "abs()" is available and if yes compute abs(bloop).
Tcl
package require Tcl 8.2 ; # throws an error if older
if {[info exists bloop] && [llength [info functions abs]]} {
puts [expr abs($bloop)]
}