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copied!<p>Mike, after impact, I will carve out time to build a keys() operator for hashes. </p> <p>In the meantime, what I have done to get around this is to keep a separate array of the keys. That way, I can use map, filter and all of the set operations on the <em>index</em> and then use the those values as my keys for the hash operations</p> <pre><code>key_array = ["key1","key2","key3"]; my_hash = { "key1" : "value1", "key2" : "value2", "key3" : "value3" }; </code></pre> <p>This really only works if you are controlling the values in the hash, but here is some example code:</p> <pre><code>global { kvHash = { "key1" : "value1", "key2" : "value2", "key3" : "value3" }; kArray = ["key1","key2","key3"]; } pre { pickKey = kArray[1]; value = kvHash.pick("$.#{pickKey}"); // add a new value newKey = "key4"; newVal = "value4"; newArray = kArray.union(newKey); newHash = kvHash.put([newKey],newVal); } </code></pre> <p>Noticed that I used the set operator <strong><a href="http://docs.kynetx.com/docs/Sets#Union_.28A_.E2.88.AA_B.29" rel="nofollow">union</a></strong> to keep the array full of unique values</p> <p>The javascript that is generated shows what this does:</p> <pre><code>var pickKey = 'key2'; var value = 'value2'; var newKey = 'key4'; var newVal = 'value4'; var newArray = ['key1', 'key2', 'key3', 'key4']; var newHash = {'key2' :'value2','key1' :'value1','key4' :'value4','key3' :'value3'}; </code></pre> <p>Now, you can use the <strong><a href="http://docs.kynetx.com/docs/Map" rel="nofollow">map</a></strong> or <strong><a href="http://docs.kynetx.com/docs/Filter" rel="nofollow">filter</a></strong> operators to pass each value individually to a function</p> <pre><code>c.map(function(x){x+2}) c.filter(function(x){x<5}) </code></pre>

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