PowerShell nested depth of statistical functions

PowerShell nested depth of statistical functions

This article mainly introduces how PowerShell implements nested depth of statistical functions. This article shares a function that can implement nested layers of statistical script execution. For more information, see

When you call a function, PowerShell adds a nested hierarchy. When a function calls another function or a script, the nested hierarchy is also added. Today I will share a function that tells you the hierarchy of script nesting:

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Function Test-NestLevel { $ I = 1 $ OK = $ true Do { Try { $ Test = Get-Variable-Name Host-Scope $ I } Catch { $ OK = $ false } $ I ++ } While ($ OK)   $ I }

When the function you call has a recursive call, the above function is very useful. Let's look at an example of the call:

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Function Test-Diving { Param ($ Depth)   If ($ Depth-gt 10) {return}   "Diving deeper to $ Depth meters ..."   $ CurrentDepth = Test-NestLevel "Calculated depth: $ currentDepth"   Test-Diving-depth ($ Depth + 1) }   Test-Diving-depth 1

When you run Test-Diving, the function calls itself 10 times. The function uses a parameter to control the nested hierarchy, while Test-NestLevel is responsible for returning the exact depth number.

Note that there is a difference: Test-NestLevel returns an absolute nested level, and the parameter records the number of times this function is called. If Test-Diving is embedded into another function, the absolute depth and relative depth are different.

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Ps c: \> Test-Diving-Depth 1 Diving deeper to 1 meters... Calculated depth: 1 Diving deeper to 2 meters... Calculated depth: 2 Diving deeper to 3 meters... Calculated depth: 3 Diving deeper to 4 meters... Calculated depth: 4 Diving deeper to 5 meters... Calculated depth: 5 Diving deeper to 6 meters... Calculated depth: 6 Diving deeper to 7 meters... Calculated depth: 7 Diving deeper to 8 meters... Calculated depth: 8 Diving deeper to 9 meters... Calculated depth: 9 Diving deeper to 10 meters... Calculated depth: 10   Ps c :\>& {Test-Diving-Depth 1} Diving deeper to 1 meters... Calculated depth: 2 Diving deeper to 2 meters... Calculated depth: 3 Diving deeper to 3 meters... Calculated depth: 4 Diving deeper to 4 meters... Calculated depth: 5 Diving deeper to 5 meters... Calculated depth: 6 Diving deeper to 6 meters... Calculated depth: 7 Diving deeper to 7 meters... Calculated depth: 8 Diving deeper to 8 meters... Calculated depth: 9 Diving deeper to 9 meters... Calculated depth: 10 Diving deeper to 10 meters... Calculated depth: 11   Ps c: \>

Test-NestLevel always returns the nested depth from the current Code scope to the global scope.