hara.data.base.diff — hara/base 3.0.11

changed clj

(changed new old)

Outputs what has changed between the two maps

(changed {:a {:b {:c 3 :d 4}}} {:a {:b {:c 3}}}) => {:a {:b {:d 4}}}

diff clj

(diff m1 m2)

(diff m1 m2 reversible)

Finds the difference between two maps

(diff {:a 2} {:a 1}) => {:+ {} :- {} :> {[:a] 2}}

(diff {:a {:b 1 :d 3}} {:a {:c 2 :d 4}} true) => {:+ {[:a :b] 1} :- {[:a :c] 2} :> {[:a :d] 3} :< {[:a :d] 4}}

diff-changes clj

(diff-changes m1 m2)

(diff-changes m1 m2 arr)

Finds changes in nested maps, does not consider new elements

(diff-changes {:a 2} {:a 1}) => {[:a] 2}

(diff-changes {:a {:b 1 :c 2}} {:a {:b 1 :c 3}}) => {[:a :c] 2}

diff-new clj

(diff-new m1 m2)

(diff-new m1 m2 arr)

Finds new elements in nested maps, does not consider changes

(diff-new {:a 2} {:a 1}) => {}

(diff-new {:a {:b 1}} {:a {:c 2}}) => {[:a :b] 1}

merge-or-replace clj

(merge-or-replace x v)

If both are maps then merge, otherwis replace

(merge-or-replace {:a {:b {:c 2}}} {:a {:b {:c 3 :d 4}}}) => {:a {:b {:c 3 :d 4}}}

patch clj

(patch m diff)

Use the diff to convert one map to another in the forward direction based upon changes between the two.

(let [m1 {:a {:b 1 :d 3}} m2 {:a {:c 2 :d 4}} df (diff m2 m1)] (patch m1 df)) => {:a {:c 2 :d 4}}

unpatch clj

(unpatch m diff)

Use the diff to convert one map to another in the reverse direction based upon changes between the two.

(let [m1 {:a {:b 1 :d 3}} m2 {:a {:c 2 :d 4}} df (diff m2 m1 true)] (unpatch m2 df)) => {:a {:b 1 :d 3}}