#眉標=PowerShell
#副標=PowerShell = Shell + Script + .NET（6）
#大標= PowerShell的流程控制
#作者=文／蔡學鏞




==<反灰>===========
$l = 0; foreach ($f in dir *.txt) { $l += $f.length }
==<end>==============





==<反灰>===========
PS > foreach ($i in 1..10)
>> { [void] $foreach.MoveNext(); $i + $foreach.current }
>>
3
7
11
15
19
==<end>==============




==<反灰>===========
PS > foreach ($i in "hi") {$i }
hi
==<end>==============




==<反灰>===========
:outer while (1)
{
    while(1)
    {
        break outer;
    }
}
==<end>==============




==<反灰>===========
PS > switch (1) { 1 { "One" } 2 { "two" } }
One
==<end>==============




==<反灰>===========
PS > switch (2) { 1 { "One" } 2 { "two" } 2 {"another 2"} }
two
another 2
==<end>==============




==<反灰>===========
PS > switch (2) {1 {"One"} 2 {"two"; break} 2 {"another 2"}}
two
==<end>==============



==<反灰>===========
PS > switch (3) { 1 { "One" } 2 { "two" } default {"default"} }
default
==<end>==============




==<反灰>===========
PS > switch -wildcard ('abc') {a* {"astar"} *c {"starc"}}
astar
starc
==<end>==============




==<反灰>===========
PS > switch -regex ('abc') {^a {"a*: $_"} 'c$' {"*c: $_"}}
a*: abc
*c: abc
==<end>==============




==<反灰>===========
PS > switch (8) {
>> {$_ -gt 3} {"greater than three"}
>> {$_ -gt 7} {"greater than 7"}}
>>
greater than three
greater than 7
==<end>==============




==<反灰>===========
PS > switch(1,2,3,4,5,6) {
>> {$_ % 2} {"Odd $_"; continue}
>> 4 {"FOUR"}
>> default {"Even $_"}
>> }
>>
Odd 1
Even 2
Odd 3
FOUR
Odd 5
Even 6
==<end>==============




==<反灰>===========
PS > foreach ($f in dir *.txt) { $f.length }
==<end>==============




==<反灰>===========
PS > dir *.txt | foreach-object {$_.length}
==<end>==============





==<反灰>===========
PS > 1..5|%{$_*2}
==<end>==============





==<反灰>===========
PS > 1..10 | where {! ($_ -band 1)}
==<end>==============




==<反灰>===========
PS > $result = new-object System.Collections.ArrayList
PS > for ($i=1; $i -le 10; $i++) { $result.Append($i) }
PS > "$($result.ToArray())"
1 2 3 4 5 6 7 8 9 10
==<end>==============




==<反灰>===========
PS > $result = $(for ($i=1; $i -le 10; $i++) {$i})
PS > "$result"
1 2 3 4 5 6 7 8 9 10
==<end>==============




==<反灰>===========
PS > $var
==<end>==============




==<反灰>===========
PS > $var = $(if (! $var) { 12 } else {$var})
PS > $var
12
==<end>==============




==<反灰>===========
PS > $var="Hello there"
PS > $var = $(if (! $var) { 12 } else {$var})
PS > $var
Hello there
==<end>==============