Basically the same way you would flatten a nested list, you just have to do the extra work for iterating the dict by key/value, creating new keys for your new dictionary and creating the dictionary at final step. import collections def flatten(d, parent_key=”, sep=’_’): items = [] for k, v in d.items(): new_key = parent_key … Read more
Both JSON.stringify and JSON.parse support a second argument. replacer and reviver respectively. With replacer and reviver below it’s possible to add support for native Map object, including deeply nested values function replacer(key, value) { if(value instanceof Map) { return { dataType: ‘Map’, value: Array.from(value.entries()), // or with spread: value: […value] }; } else { return … Read more
Assuming every dict has a value key, you can write (assuming your list is named l) [d[‘value’] for d in l] If value might be missing, you can use [d[‘value’] for d in l if ‘value’ in d]
You’ll want a Map<String, String>. Classes that implement the Map interface include (but are not limited to): HashMap LinkedHashMap Hashtable Each is designed/optimized for certain situations (go to their respective docs for more info). HashMap is probably the most common; the go-to default. For example (using a HashMap): Map<String, String> map = new HashMap<String, String>(); … Read more
If you’re using .NET 3.5, use the Lookup class. EDIT: You generally create a Lookup using Enumerable.ToLookup. This does assume that you don’t need to change it afterwards – but I typically find that’s good enough. If that doesn’t work for you, I don’t think there’s anything in the framework which will help – and … Read more
Like this: host = connectionDetails.get(‘host’, someDefaultValue)
Well, you could do this: >>> if all(k in foo for k in (“foo”,”bar”)): … print “They’re there!” … They’re there!
A dictionary has, by definition, an arbitrary number of keys. There is no “the key”. You have the keys() method, which gives you a python list of all the keys, and you have the iteritems() method, which returns key-value pairs, so for key, value in mydic.iteritems() : print key, value Python 3 version: for key, … Read more
Could there be any problem if i replace Method-1 by Method-2? No, just use map[key] = value. The two options are equivalent. Regarding Dictionary<> vs. Hashtable: When you start Reflector, you see that the indexer setters of both classes call this.Insert(key, value, add: false); and the add parameter is responsible for throwing an exception, when … Read more
You can use <li ng-repeat=”(name, age) in items”>{{name}}: {{age}}</li> See ngRepeat documentation. Example: http://jsfiddle.net/WRtqV/1/