Currently I have an array of strings.
$vals = #()
$vals = $vals + $string
How can I store objects instead? F.e. just like in javascript:
{string: 'string', path: 'path'}
Is there an equivalent in powershell to store such objects?
As of PowerShell 3.0 you can initialize a custom object with the following syntax:
[pscustomobject]#{string = 'string';path = 'path'}
So to add to a dynamically sized array, simply do:
$vals = #()
$vals += [pscustomobject]#{string = 'string';path = 'path'}
Related
I have the following code:
my #logs = split(",",$opts->{"logs"});
$opt_href->{"logs"} = \#logs;
It basically splits the $opts->{"logs"} by comma and keeps the array ref. Later I need to check if string exists in the $opt_href->{"logs"} array. Looking at this topic, I see that it's recommended to keep a hash, instead of array. I could just do:
my %logs;
for each my $log (split(",",$opts->{"logs"})) {
$logs{$log} = 1;
}
$opt_href->{"logs"} = \%logs;
Is there a better way to do this? Maybe a one/two liners?
my %logs = map { $_ => 1 } split /,/, $opts->{logs};
$opt_href->{logs} = \%logs;
Or, using the anonymous hash reference, constructed by { }
$opt_href->{logs} = { map { $_ => 1 } split /,/, $opts->{logs} };
Below is the result of an API call via Invoke-Restmethod
And output of $test.result.organizationContext is as follows
How can I add an line item to this "organizationContext" object with values for the different attributes like " name", "id" ?
If we assume that you already have the values you want to add defined in variables, you can create a new custom object and then effectively, yet inefficiently, add it to the array.
$newOrganizationContext = [pscustomobject]#{
classificationId = $classificationId
group = $group
id = $id
isGroupSeparator = $isGroupSeparator
name = $name
objectId = $objectId
path = $path
subClass = $subClass
synchronized = $synchronized
type = $type
}
$test.result.organizationContext += $newOrganizationContext
What is the shortest and nicest way to have a hash table literal and instantly look up a value in it?
e.g. I was expecting something like
$city = #{"30328" = "Atlanta"; "60608" = "Chicago"} [$zipCode]
but that ends with:
Unexpected token '[$zipCode]' in expression or statement.
Just remove the space:
$city = #{"30328" = "Atlanta"; "60608" = "Chicago"}[$zipCode]
or
$city = #{"30328" = "Atlanta"; "60608" = "Chicago"}.$zipCode
I have a setter sub setAssignmentStatus which takes an array of hashes (AoH from here on) and another parameter (do not concern yourself with this as that part works), and does something iterating through the AoH to set another entry in each hash element. It does not return anything because I want to use the same AoH object with the added entries after it is pulled through the setter sub and not construct a whole new AoH and repopulate the entries. Here is the setter:
sub setAssignmentStatus
{
my $fileFlatArySclr = $_[0];
my $cfgFile = $_[1];
#here I convert the AoH from the scalar necessary for the sub to its native form
my #fileFlatAry = #$fileFlatArySclr;
#this works, don't worry
my %cfgVarHash = getConfigVars($cfgFile);
foreach my $fileVarHashSclr(#fileFlatAry)
{
#convert each AoH entry from scalar necessary for iteration to native hash
my %varHash = %$fileVarHashSclr;
my $varName = $varHash{'VAR_NAME'};
my $asgnLineCnt = $varHash{'ASGN_CNT'};
my $asgnSts;
my $fileAsgnSts;
my $cfgAsgnSts;
if($asgnLineCnt > 0) { $fileAsgnSts = 1; } else { $fileAsgnSts = 0; }
my $cfgAsgnLine = $cfgVarHash{$varName};
if($cfgAsgnLine ne undef) { $cfgAsgnSts = 1; } else { $cfgAsgnSts = 0; }
$asgnSts = $fileAsgnSts.$cfgAsgnSts;
#debug to make sure $asgnSts is not null in the first place (it is not!)
print "\n*** setting ASGN_STUS of ".$varName." to ".$asgnSts;
#Here we set ASGN_STUS for every iteration
$varHash{'ASGN_STUS'} = $asgnSts;
}
}
It is called as follows:
setAssignmentStatus(\#fileFlatAry, $cfgFile);
However, after sending the #fileFlatAry AoH through setAssignmentStatus, each element hash does not contain an ASGN_STUS entry. Why is that and how can I fix it?
My suspicion is that I am doing something wrong with the \ modifier, which is how I am getting the data structure to be passed as a scalar parameter to the sub but I am not sure.
You modify %varHash instead of modyfing the referenced hash. Stop copying everything into local variables and modyfying the local variables.
$varHash{'ASGN_STUS'} = ...;
should be
$fileVarHashSclr->{'ASGN_STUS'} = ...;
I wouldn't do my #fileFlatAry = #$fileFlatArySclr; either. Pure waste.
I created an array like so:
while(#results = $execute->fetchrow())
{
my $active = 'true';
if($results[1] == 0)
{
$active = 'false';
}
my #campaign = ($results[0], $active);
push(#campaign_names, #campaign);
}
Later, when I need to access the name of the campaign (which is the first element of the campaign array), I can't seem to extract it. What is the proper syntax?
foreach $campaign (#campaign_names)
{
print ????;
}
Thanks!
The problem is you're pushing an array onto the end of #campaign_names, when what you want is an array reference. Here's how I'd write it:
while(#results = $execute->fetchrow())
{
my $active = $results[1] ? 'true' : 'false';
push #campaign_names, [ $results[0], $active ];
}
# later
foreach my $campaign( #campaign_names )
{
my $name = $campaign->[0];
my $active = $campaign->[1];
}
I've cleaned it up a bit by using a ternary conditional (?:) to figure out the value of $active. The [ ... ] constructs an anonymous array reference (a scalar pointing to an array) which is then pushed onto #campaign_names.
When we loop over those later, two important things to notice are that we use my in the loop variable to keep it local to the loop block, and that we use -> to dereference the elements in the array pointed to by the array reference.
That's not creating an array of arrays. my #campaign = ($results[0], $active); push(#campaign_names, #campaign); flattens and pushes $results[0] and $active into the #campaign_names array. Instead, push an arrayref:
my #campaign = ($results[0], $active);
push(#campaign_names, \#campaign);
or
my $campaign = [$results[0], $active];
push(#campaign_names, $campaign);
Arrays can only hold scalar values.
You'll want to refer to perldsc as you learn (perldoc perldsc, http://perldoc.perl.org/perldsc.html)