Using Ruby hashes as keyword arguments
Using Ruby hashes as keyword arguments 1.0

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Using Ruby hashes as keyword arguments 1.0



Category: Scripts / Snippets

However, as you have more and more keyword options, setting defaults in this way gets rather tedious. Fortunately, Ruby's Hash#merge comes to our rescue (almost) - it allows you to merge the contents of one hash with another.

However, as you have more and more keyword options, setting defaults in this way gets rather tedious. Fortunately, Ruby's Hash#merge comes to our rescue (almost) - it allows you to merge the contents of one hash with another. The only problem - any duplicate keys in the hash you are merging will overwrite your original hash values - when it comes to setting default values, we want this to work the other way around; we only want values in the defaults hash to be merged if they do not exist in the original hash. Again, Ruby comes to our rescue - Hash#merge takes a block as an argument and will pass any duplicate values that crop up into the block - we can use this block to decide which value to keep.

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