associative-array
Bash associative array sorting by value
You can easily sort your output, in descending numerical order of the 3rd field: for k in “${!authors[@]}” do echo $k ‘ – ‘ ${authors[“$k”]} done | sort -rn -k3 See sort(1) for more about the sort command. This just sorts output lines; I don’t know of any way to sort an array directly in … Read more
JavaScript associate array
Well, you can do this: var myMap = { key: [ value1, value2 ] }; var array = myMap.key; // or myMap[“key”] JavaScript doesn’t have an “associative array” type, one that combines “map” behavior with array behavior like keeping track of the number of properties. Thus the common thing to do is use a plain … Read more
Replace item in association list in elisp
With alists, you usually add a new cons in front of the old one to “shadow” the old value, like so: (add-to-list ‘a1 ‘(:k1 10)) After you do this (assoc :k1 a1) will return 10. If you want to “undo” your change so assoc again returns your old value, use this code: (setq a1 (delq … Read more
Redis how to store associative array? Set or Hash or List?
You can use SET and Hash and SORT in combination redis 127.0.0.1:6379> HMSET TEST_12345 name “Post A” val2 “Blah Blah” val3 “Blah Blah Blah” OK redis 127.0.0.1:6379> HMSET TEST_54321 name “Post B” val2 “Blah Blah” val3 “Blah Blah Blah” OK redis 127.0.0.1:6379> HMSET TEST_998877 name “Post C” val2 “Blah Blah” val3 “Blah Blah Blah” OK … Read more
What’s the difference between pls_integer and binary_integer?
Historical reasons. They used to be different before 10g: On 8i and 9i, PLS_INTEGER was noticeably faster than BINARY_INTEGER. When it comes to declaring and manipulating integers, Oracle offers lots of options, including: INTEGER – defined in the STANDARD package as a subtype of NUMBER, this datatype is implemented in a completely platform-independent fashion, which … Read more