keyvaluepair

问题 At the beginning I needed a map, so I used std::map. Then, some requirements were added and I needed to also get "keys" for "value" (foos for bar), so I used boost::bimaps::bimap< boost::bimaps::unordered_set_of<boost::bimaps::tagged<std::string, foo>>, boost::bimaps::multiset_of<boost::bimaps::tagged<std::string, bar>>> And after that, some more requirements were added, so now I need to store a number for every foo and from the right side view I need to be able to call <bimap>.righ.find(bar)

问题 I have used xlrd to pull data from a column (Data Below). I need to group together the ip addressess. So ip address that appear next together in the output belong to the same pool and single ones are in a pool of their own. For example (10.100.33.183,10.100.33.184) belong to (pool1). (Pool6 =10.100.33.89) How do I go about achieving this all help welcome. ['', '', '', '', '', '', '', 'Pool Member IP', '', '10.100.33.184 (S56723FR6VL01)', '10.100.33.183 (S56723FR6VL02)', '', '', '', '', '', ''

问题 How would I go about invoking a method call for an Object after casting it to a Type? I have a KeyValuePair which stores the type of the object and the object itself. I then want to cast this object to its key type and invoke a method of that class type. KeyValuePair<Type, Object> client = myClients.Find( delegate(KeyValuePair<Type, Object> result) { return (result.Key == myClients[clientNumber].Key); // Match client of the same type } ); if (client.Value != null) { // cast client.Value to

问题 Assume a one-line string with multiple consecutive key-value pairs, separated by a space, but with space allowed also within values (not in keys), e.g. key1=one two three key2=four key3=five six key4=seven eight nine ten Correctly extracting the key-value pairs from above would produce the following mappings: "key1", "one two" "key2", "four" "key3", "five six" "key4", "seven eight nine ten" where "keyX" can be any sequence of characters, excluding space. Trying something simple, like ([^=]+=[

问题 How can you use the value of a key-value pair as the key in a different key-value pair in javascript? I'd like to do the following: var gizmos = {gizmo1: "G1"}; var things = {gizmos.gizmo1: "T1"}; So that things essentially equals: var things = {"G1": "T1"}; 回答1: Like this: var gizmos = {gizmo1: "G1"}; var things = {}; things[gizmos.gizmo1] = "T1"; There's no way to do it as part of the object initializer (aka object "literal"), you have to do it after. The reason it works is that in

问题 I have two arrays , keys and commonkeys I want to create a key value pair using these two arrays and the output should be like langKeys How to do that? This is array one var keys=['en_US','es_ES', 'pt_PT','fr_FR','de_DE','ja_JP','it_IT'] This is array two var commonKeys=['en-*','es-*', 'pt-*','fr-*','de-*','ja-*','it-*', '*'] This is the output I need var langKeys = { 'en-*':'en_US', 'es-*':'es_ES', 'pt-*':'pt_PT', 'fr-*':'fr_FR', 'de-*':'de_DE', 'ja-*':'ja_JP', 'it-*':'it_IT', '*':'en_US' };

问题 I have a large PHP array, similar to: $list = array( array( 'id' = '3243' 'link' = 'fruits' 'lev' = '1' ), array( 'id' = '6546' 'link' = 'apple' 'lev' = '2' ), array( 'id' = '9348' 'link' = 'orange' 'lev' = '2' ) ) I want to get the sub-array which contains a particular id . Currently I use the following code: $id = '3243' foreach ($list as $link) { if (in_array($id, $link)) { $result = $link; } } It works but I hope there is a better way of doing this. 回答1: You can write $link['id']==$id

问题 I'm trying to load a list of KeyValuePairs from an EF / Linq query like this: return (from o in context.myTable select new KeyValuePair<int, string>(o.columnA, o.columnB)).ToList(); My problem is that this results in the error "Only parameterless constructors and initializers are supported in LINQ to Entities." Is there an easy way around this? I know I could create a custom class for this instead of using KeyValuePair but that does seem like re-inventing the wheel. 回答1: Select only columnA

问题 I'm trying to load a list of KeyValuePairs from an EF / Linq query like this: return (from o in context.myTable select new KeyValuePair<int, string>(o.columnA, o.columnB)).ToList(); My problem is that this results in the error "Only parameterless constructors and initializers are supported in LINQ to Entities." Is there an easy way around this? I know I could create a custom class for this instead of using KeyValuePair but that does seem like re-inventing the wheel. 回答1: Select only columnA

问题 I have tried my hand using for loop with Dictionary but couldn't really achieve what I want to. I have a certain variable SomeVariable and on the value of this variable I want my foreach to work. SomeVariable can be 1,2,3 or 4 So lets say SomeVariable is 1 I want to retrieve the last item.value from among the first 3 indexes(0,1,2) inside the SomeCollection . And if SomeVariable is 2 I want to retrieve the last item.value from among the next 3 indexes(3,4,5) inside the SomeCollection . And so