push new element into array within hash
I have a hash which, I hav开发者_StackOverflow中文版e keys that uniquely identify each element within the hash. And within each element, I have an array. So my question is, how do I put another element inside that array within the hash.
{"Apple"=>[1, 5.99], "Banana"=>[5, 9.99]}
I'm looping through a result set, and I'm a little bit lost how to add another element to the array...
If your hash is called, for example, hsh
, then the "Apple" array can be accessed by hsh["Apple"]
. You can use this like any variable, so to add a value to that array just do hsh["Apple"] << some_value
. Like so:
irb> hsh = { "Apple" => [1, 5.99], "Banana" => [5, 9.99] }
irb> hsh["Apple"] << 9999
=> { "Apple" => [1, 5.99, 9999], "Banana" => [5, 9.99] }
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