Check string is empty, white space or null Logic Apps - azure-logic-apps

Question

I am parsing CSV and checking if any item/string is empty/white space/null but none if the condition is not working!!
What I am doing wrong here?
Logic to check
Scenario
Parse CSV by each line and then by each column and check if string is empty/whitespace/null
If string is empty/whitespace/null
IscorrectCSV =False
Else
IscorrectCSV =True
INPUT 1
name,age
a1,34
a2,null
a3," "
a4,""
a5," 4"
A6,
EXPECTED OUTPUT 1
IscorrectCSV =False
INPUT 2
name,age
a1,34
a2,35
a3,36
EXPECTED OUTPUT 2
IscorrectCSV =True

Answer 1

First you need replace and instead of OR
remove first comparison and set variable before condition
First check if is equal null
Secondly check if the formula length() is equal to 0

Answer 2

After reproducing from my end, I could able to achieve this using below flow.
First I tried to form an Array from the sample csv given and then I used condition action inside a for-each loop to loop through second column item and check for the condition.
RESULTS:
You can reproduce the same in your logic app using the below code-view
{
"definition": {
"$schema": "https://schema.management.azure.com/providers/Microsoft.Logic/schemas/2016-06-01/workflowdefinition.json#",
"actions": {
"Array": {
"inputs": {
"variables": [
{
"name": "Array",
"type": "array",
"value": "#skip(split(outputs('Compose'),'\n'),1)"
}
]
},
"runAfter": {
"Compose": [
"Succeeded"
]
},
"type": "InitializeVariable"
},
"Compose": {
"inputs": "name,age\na1,34\na2,NULL\na3, \na4,''\na5,",
"runAfter": {},
"type": "Compose"
},
"Compose_2": {
"inputs": "#variables('FinalArray')",
"runAfter": {
"For_each": [
"Succeeded"
]
},
"type": "Compose"
},
"FinalArray": {
"inputs": {
"variables": [
{
"name": "FinalArray",
"type": "array"
}
]
},
"runAfter": {
"Array": [
"Succeeded"
]
},
"type": "InitializeVariable"
},
"For_each": {
"actions": {
"Condition": {
"actions": {
"Append_to_array_variable": {
"inputs": {
"name": "FinalArray",
"value": "#{items('For_each')} - #{variables('IscorrectCSV')}"
},
"runAfter": {
"Set_IscorrectCSV_-_False": [
"Succeeded"
]
},
"type": "AppendToArrayVariable"
},
"Set_IscorrectCSV_-_False": {
"inputs": {
"name": "IscorrectCSV",
"value": false
},
"runAfter": {},
"type": "SetVariable"
}
},
"else": {
"actions": {
"Append_to_array_variable_2": {
"inputs": {
"name": "FinalArray",
"value": "#{items('For_each')} - #{variables('IscorrectCSV')}"
},
"runAfter": {
"Set_IscorrectCSV_-_True": [
"Succeeded"
]
},
"type": "AppendToArrayVariable"
},
"Set_IscorrectCSV_-_True": {
"inputs": {
"name": "IscorrectCSV",
"value": true
},
"runAfter": {},
"type": "SetVariable"
}
}
},
"expression": {
"or": [
{
"equals": [
"#slice(items('For_each'),add(indexOf(items('For_each'),','),1),length(items('For_each')))",
"NULL"
]
},
{
"equals": [
"#slice(items('For_each'),add(indexOf(items('For_each'),','),1),length(items('For_each')))",
" "
]
},
{
"equals": [
"#slice(items('For_each'),add(indexOf(items('For_each'),','),1),length(items('For_each')))",
"''"
]
},
{
"lessOrEquals": [
"#length(slice(items('For_each'),add(indexOf(items('For_each'),','),1),length(items('For_each'))))",
0
]
}
]
},
"runAfter": {},
"type": "If"
}
},
"foreach": "#variables('Array')",
"runAfter": {
"IscorrectCSV": [
"Succeeded"
]
},
"type": "Foreach"
},
"IscorrectCSV": {
"inputs": {
"variables": [
{
"name": "IscorrectCSV",
"type": "boolean"
}
]
},
"runAfter": {
"FinalArray": [
"Succeeded"
]
},
"type": "InitializeVariable"
}
},
"contentVersion": "1.0.0.0",
"outputs": {},
"parameters": {},
"triggers": {
"manual": {
"inputs": {
"schema": {}
},
"kind": "Http",
"type": "Request"
}
}
},
"parameters": {}
}

Answer 3

You can use the empty and trim expression together to find if the array item has some value