EXAMPLE - ARRAYSTOMAP Function
This example illustrates how to use the ARRAYSTOMAP and KEYS functions to convert values in Array or Object data type of key-value pairs.
Functions:
Item | Description |
|---|---|
ARRAYSTOMAP Function | Combines one array containing keys and another array containing values into an Object of key-value pairs. |
KEYS Function | Extracts the key values from an Object data type column and stores them in an array of String values. |
Source:
Your dataset contains master product data with product properties stored in two arrays of keys and values.
ProdId | ProdCategory | ProdName | ProdKeys | ProdProperties |
|---|---|---|---|---|
S001 | Shirts | Crew Neck T-Shirt | ["type", "color", "fabric", "sizes"] | ["crew","blue","cotton","S,M,L","in stock","padded"] |
S002 | Shirts | V-Neck T-Shirt | ["type", "color", "fabric", "sizes"] | ["v-neck","white","blend","S,M,L,XL","in stock","discount - seasonal"] |
S003 | Shirts | Tanktop | ["type", "color", "fabric", "sizes"] | ["tank","red","mesh","XS,S,M","discount - clearance","in stock"] |
S004 | Shirts | Turtleneck | ["type", "color", "fabric", "sizes"] | ["turtle","black","cotton","M,L,XL","out of stock","padded"] |
Transformation:
When the above data is loaded into the Transformer page, you might need to clean up the two array columns.
Using the following transform, you can map the first element of the first array as a key for the first element of the second, which is its value. You might notice that the number of keys and the number of values are not consistent. For the extra elements in the second array, the default key of ProdMiscProperties is used:
Transformation Name | |
|---|---|
Parameter: Formula type | Single row formula |
Parameter: Formula | ARRAYSTOMAP(ProdProperties, ProdValues, 'ProdMiscProperties') |
Parameter: New column name | 'prodPropertyMap' |
You can now use the following steps to generate a new version of the keys:
Transformation Name | |
|---|---|
Parameter: Columns | ProdKeys |
Parameter: Action | Delete selected columns |
Transformation Name | |
|---|---|
Parameter: Formula type | Single row formula |
Parameter: Formula | KEYS(prodPropertyMap) |
Parameter: New column name | 'ProdKeys' |
Results:
ProdId | ProdCategory | ProdName | ProdKeys | ProdProperties | prodPropertyMap |
|---|---|---|---|---|---|
S001 | Shirts | Crew Neck T-Shirt | ["type", "color", "fabric", "sizes","ProdMiscProperties"] | ["crew","blue","cotton","S,M,L","in stock","padded"] | {
"type": [ "crew" ],
"color": [ "blue" ],
"fabric": [ "cotton" ],
"sizes": [ "S,M,L" ],
"ProdMiscProperties": [ "in stock", "padded" ] } |
S002 | Shirts | V-Neck T-Shirt | ["type", "color", "fabric", "sizes","ProdMiscProperties"] | ["v-neck","white","blend","S,M,L,XL","in stock","discount - seasonal"] | {
"type": [ "v-neck" ],
"color": [ "white" ],
"fabric": [ "blend" ],
"sizes": [ "S,M,L,XL" ],
"ProdMiscProperties": [ "in stock", "discount - seasonal" ] } |
S003 | Shirts | Tanktop | ["type", "color", "fabric", "sizes","ProdMiscProperties"] | ["tank","red","mesh","XS,S,M","discount - clearance","in stock"] | {
"type": [ "tank" ],
"color": [ "red" ],
"fabric": [ "mesh" ],
"sizes": [ "XS,S,M" ],
"ProdMiscProperties": [ "discount - clearance", "in stock" ] } |
S004 | Shirts | Turtleneck | ["type", "color", "fabric", "sizes","ProdMiscProperties"] | ["turtle","black","cotton","M,L,XL","out of stock","padded"] | {
"type": [ "turtle" ],
"color": [ "black" ],
"fabric": [ "cotton" ],
"sizes": [ "M,L,XL" ],
"ProdMiscProperties": [ "out of stock", "padded" ] } |