提取Powershell中数组的最后一行

我正在使用Powershell通过API提取数据。出于某种原因，输出提供了多行数据，但是我只对最后一行感兴趣

如何修剪或过滤数组，使其仅显示行，例如

{“preview”：false…

在得到最后一行之后，我将使用convertfromjson将其转换为哈希表

任何建议都将不胜感激

$output
{"preview":true,"offset":0,"lastrow":true,"result":{"TotalSuccess":"1152091","TotalUnsuccessful":"13759","Total":"1165850","Unsuccessful%":"6.80"}}
{"preview":true,"offset":0,"lastrow":true,"result":{"TotalSuccess":"1204330","TotalUnsuccessful":"14265","Total":"1218595","Unsuccessful%":"6.76"}}
{"preview":true,"offset":0,"lastrow":true,"result":{"TotalSuccess":"1233151","TotalUnsuccessful":"14500","Total":"1247651","Unsuccessful%":"6.75"}}
{"preview":true,"offset":0,"lastrow":true,"result":{"TotalSuccess":"1249102","TotalUnsuccessful":"14714","Total":"1263816","Unsuccessful%":"6.76"}}
{"preview":true,"offset":0,"lastrow":true,"result":{"TotalSuccess":"1262812","TotalUnsuccessful":"14794","Total":"1277606","Unsuccessful%":"6.73"}}
{"preview":false,"offset":0,"lastrow":true,"result":{"TotalSuccess":"1271004","TotalUnsuccessful":"14873","Total":"1285877","Unsuccessful%":"6.73"}}

---

多个选项，假设

$output

是一个数组或类似的可枚举集合：

# using `Select-Object`:
$output |Select -Last1

# using array index
$output[$output.Length - 1]

# using negative array index
$output[-1]

# iterate over collection until you reach the end:
$last = $null
foreach($item in $output){
    $last = $item
}

如果

$output

是多行字符串，请首先使用

-split

正则表达式在换行符上进行拆分：

$output -split '\r?\n' |Select -Last 1

---

1,2,3 |选择-Last 1

。感谢您的回复。这些似乎只是提取字符，而不是rows@Cyclemonkey更新了答案，请查看最后一个示例这似乎也没有拆分出来。@Cyclemonkey then

$output

不是包含多行的字符串：）您是如何在第一个示例中获取/创建变量的place？啊！我运行了以下程序，它通过API提取JSON…$output=Invoke RestMethod-Method Post-Uri$url-Credential$cred-Body$Body