Substring Post-processing function can be used in the agents, to extract the sub-string from the string of given field in each row. For example, I have this scraping agent ‘SubString Function Example(Post-processing)’ in my account and I want to get an image dimension from ProductImage field. So, I can use the Substring Post-processing function to extract the substring from the string.
Before
Steps
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Edit the scraping agent by clicking on the Edit tab
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Go to the field Image Dimension and click on the Edit field button
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Now, click on the Add Post-Processing button to add the
Substringfunction, the below dialog box will appear: -
Substringfunction holds the Input parameters as a StartIndex which represents the zero-based starting character position of this sub-string and other one is Length which represents ‘the number of character of the sub-string’ and both the numeric value extract the sub-string -
Then, Save the function and the scraping agent configuration
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And finally, re-run you agent to apply the function in your result.
After SubString function
If we notice, the Image Dimension field in the screenshot below, we find the sub-string by using Substring Post-processing function.
