understanding-json-schema
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json-schema-org
Type-specific keywords for PowerShell
This might be a list of types for PowerShell. This was from version 5.1.17763.1490.
JavaScript PowerShell
string System.String
number System.Int32/System.Decimal
object System.Hashtable
array System.Object[]
boolean System.Boolean
null $null
I don't understand what you are requesting here or how it relates to this set of documentation?
@karenetheridge @Liturgist is probably referring to this table which lists JSON type analogues in different languages. Unfortunately it currently only lists Python and Ruby. I see no reason we couldn't add PowerShell to the table. I think its current sparseness is merely due to waiting for people to contribute additional entires.
@embray, yes, I was thinking that PowerShell could be added to that table.
Specifying an exponent produces a System.Double in PowerShell.
Powershell types derive from .Net. While these are fine (and I might have a few edits if we choose move forward), the canonical way to deal with JSON now is with the System.Text.Json namespace, which supplies its own data models and serializer.
Ah I see! Well, let me add some types for Perl:
| JavaScript | Perl |
|---|---|
| string | scalar (SV) |
| number | scalar (NV or IV), or Math::BigNum, Math::BigInt |
| object | reftype=HASH |
| array | reftype=ARRAY |
| boolean | scalar or JSON::PP::Boolean |
| null | scalar (undef) |
I see some differences between Windows PowerShell and PowerShell Core. Here is the code and output from each.
$json = @"
{
"a_string": "now",
"an_integer": 1,
"a_float": 1.2,
"an_exponent": 1.2E3,
"an_object": {
"1": "a",
"2": "b"
},
"an_array": [1, 2, 3],
"a_boolean": true,
"a_null": null
}
"@
$p = $json | ConvertFrom-Json
$members = @(
'a_string',
'an_integer',
'a_float',
'an_exponent',
'an_object',
'an_array',
'a_boolean'
)
foreach ($member in $members) {
$($p.$member.GetType()) |
Select-Object -Property @{name='Member';e={$member}},Name,BaseType
}
Windows PowerShell
PS C:\src\t> $PSVersionTable.PSVersion.ToString()
5.1.19041.610
PS C:\src\t> .\json-types.ps1
Member Name BaseType
------ ---- --------
a_string String System.Object
an_integer Int32 System.ValueType
a_float Decimal System.ValueType
an_exponent Double System.ValueType
an_object PSCustomObject System.Object
an_array Object[] System.Array
a_boolean Boolean System.ValueType
PowerShell Core
PS C:\src\t> $PSVersionTable.PSVersion.ToString()
7.1.0-preview.3
PS C:\src\t> .\json-types.ps1
Member Name BaseType
------ ---- --------
a_string String System.Object
an_integer Int64 System.ValueType
a_float Double System.ValueType
an_exponent Double System.ValueType
an_object PSCustomObject System.Object
an_array Object[] System.Array
a_boolean Boolean System.ValueType
The differences between Windows PowerShell and PowerShell Core are discussed in the question and answer in:
https://stackoverflow.com/a/65040970/447901
This code may be more helpful.
PS C:\src\t> Get-Content -Path .\json-types.ps1 $json = @" { "a_string": "now", "an_integer": 9, "int_min": $(string), "int_min_minus1": $(string - 1), "int_max": $(string), "int_max_plus1": $(string + 1), "int32_min": $(string), "int32_min_minus1": $(string - 1), "int32_max": $(string), "int32_max_plus1": $(string + 1), "int64_min": $(string), "int64_min_minus1": $(string - 1), "int64_max": $(string), "int64_max_plus1": $(string + 1), "a_float": 1.2, "an_exponent": 1.2E93, "an_object": { "1": "a", "2": "b" }, "an_array": [1, 2, 3], "a_boolean": true } "@
"a_null": null
"PowerShell " + $PSVersionTable.PSVersion.ToString() $json $p = $json | ConvertFrom-Json
foreach ($member in ($p.psobject.Members | Where-Object { $_.MemberType -eq 'NoteProperty' }).Name) { $p.$member.GetType() | Select-Object -Property @{name='Member';e={$member}},Name,BaseType } PS C:\src\t> .\json-types.ps1 PowerShell 5.1.19041.610 { "a_string": "now", "an_integer": 9, "int_min": -2147483648, "int_min_minus1": -2147483649, "int_max": 2147483647, "int_max_plus1": 21474836471, "int32_min": -2147483648, "int32_min_minus1": -2147483649, "int32_max": 2147483647, "int32_max_plus1": 21474836471, "int64_min": -9223372036854775808, "int64_min_minus1": -9.22337203685478E+18, "int64_max": 9223372036854775807, "int64_max_plus1": 92233720368547758071, "a_float": 1.2, "an_exponent": 1.2E93, "an_object": { "1": "a", "2": "b" }, "an_array": [1, 2, 3], "a_boolean": true }
Member Name BaseType
a_string String System.Object an_integer Int32 System.ValueType int_min Int32 System.ValueType int_min_minus1 Int64 System.ValueType int_max Int32 System.ValueType int_max_plus1 Int64 System.ValueType int32_min Int32 System.ValueType int32_min_minus1 Int64 System.ValueType int32_max Int32 System.ValueType int32_max_plus1 Int64 System.ValueType int64_min Int64 System.ValueType int64_min_minus1 Double System.ValueType int64_max Int64 System.ValueType int64_max_plus1 Decimal System.ValueType a_float Decimal System.ValueType an_exponent Double System.ValueType an_object PSCustomObject System.Object an_array Object[] System.Array a_boolean Boolean System.ValueType
PowerShell Core
This code may be more helpful.
PS C:\src\t> Get-Content -Path .\json-types.ps1
$json = @"
{
"a_string": "now",
"an_integer": 9,
"int_min": $([string]([int]::MinValue)),
"int_min_minus1": $([string]([int]::MinValue) - 1),
"int_max": $([string]([int]::MaxValue)),
"int_max_plus1": $([string]([int]::MaxValue) + 1),
"int32_min": $([string]([int32]::MinValue)),
"int32_min_minus1": $([string]([int32]::MinValue) - 1),
"int32_max": $([string]([int32]::MaxValue)),
"int32_max_plus1": $([string]([int32]::MaxValue) + 1),
"int64_min": $([string]([int64]::MinValue)),
"int64_min_minus1": $([string]([int64]::MinValue) - 1),
"int64_max": $([string]([int64]::MaxValue)),
"int64_max_plus1": $([string]([int64]::MaxValue) + 1),
"a_float": 1.2,
"an_exponent": 1.2E93,
"an_object": {
"1": "a",
"2": "b"
},
"an_array": [1, 2, 3],
"a_boolean": true
}
"@
# "a_null": null
"PowerShell " + $PSVersionTable.PSVersion.ToString()
$json
$p = $json | ConvertFrom-Json
foreach ($member in ($p.psobject.Members | Where-Object { $_.MemberType -eq 'NoteProperty' }).Name) {
$p.$member.GetType() |
Select-Object -Property @{name='Member';e={$member}},Name,BaseType
}
PS C:\src\t> .\json-types.ps1
PowerShell 5.1.19041.610
{
"a_string": "now",
"an_integer": 9,
"int_min": -2147483648,
"int_min_minus1": -2147483649,
"int_max": 2147483647,
"int_max_plus1": 21474836471,
"int32_min": -2147483648,
"int32_min_minus1": -2147483649,
"int32_max": 2147483647,
"int32_max_plus1": 21474836471,
"int64_min": -9223372036854775808,
"int64_min_minus1": -9.22337203685478E+18,
"int64_max": 9223372036854775807,
"int64_max_plus1": 92233720368547758071,
"a_float": 1.2,
"an_exponent": 1.2E93,
"an_object": {
"1": "a",
"2": "b"
},
"an_array": [1, 2, 3],
"a_boolean": true
}
Member Name BaseType
------ ---- --------
a_string String System.Object
an_integer Int32 System.ValueType
int_min Int32 System.ValueType
int_min_minus1 Int64 System.ValueType
int_max Int32 System.ValueType
int_max_plus1 Int64 System.ValueType
int32_min Int32 System.ValueType
int32_min_minus1 Int64 System.ValueType
int32_max Int32 System.ValueType
int32_max_plus1 Int64 System.ValueType
int64_min Int64 System.ValueType
int64_min_minus1 Double System.ValueType
int64_max Int64 System.ValueType
int64_max_plus1 Decimal System.ValueType
a_float Decimal System.ValueType
an_exponent Double System.ValueType
an_object PSCustomObject System.Object
an_array Object[] System.Array
a_boolean Boolean System.ValueType
PS C:\src\t> .\json-types.ps1
PowerShell - 7.1.0-preview.3
{
"a_string": "now",
"an_integer": 9,
"int_min": -2147483648,
"int_min_minus1": -2147483649,
"int_max": 2147483647,
"int_max_plus1": 21474836471,
"int32_min": -2147483648,
"int32_min_minus1": -2147483649,
"int32_max": 2147483647,
"int32_max_plus1": 21474836471,
"int64_min": -9223372036854775808,
"int64_min_minus1": -9.22337203685478E+18,
"int64_max": 9223372036854775807,
"int64_max_plus1": 92233720368547758071,
"a_float": 1.2,
"an_exponent": 1.2E93,
"an_object": {
"1": "a",
"2": "b"
},
"an_array": [1, 2, 3],
"a_boolean": true
}
Member Name BaseType
------ ---- --------
a_string String System.Object
an_integer Int64 System.ValueType
int_min Int64 System.ValueType
int_min_minus1 Int64 System.ValueType
int_max Int64 System.ValueType
int_max_plus1 Int64 System.ValueType
int32_min Int64 System.ValueType
int32_min_minus1 Int64 System.ValueType
int32_max Int64 System.ValueType
int32_max_plus1 Int64 System.ValueType
int64_min Int64 System.ValueType
int64_min_minus1 Double System.ValueType
int64_max Int64 System.ValueType
int64_max_plus1 BigInteger System.ValueType
a_float Double System.ValueType
an_exponent Double System.ValueType
an_object PSCustomObject System.Object
an_array Object[] System.Array
a_boolean Boolean System.ValueType