nested

问题 I have a JSON file that I'm reading in as a dictionary. What I have is something like: "20101021": { "4x4": { "Central Spectrum": 5, "Full Frame": 5, "Custom": 1 }, "4x2": { "Central Spectrum": 5, "Full Frame": 5 }, "1x1": { "Central Spectrum": 5, "Full Frame": 4 }, }, "20101004": { "4x4": { "Central Spectrum": 5, "Full Frame": 5 }, "4x2": { "Central Spectrum": 5, "Full Frame": 5 }, "1x1": { "Central Spectrum": 5, "Full Frame": 5 } and so on. I am trying to calculate sums (over all dates) for

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: “Least Astonishment” in Python: The Mutable Default Argument Python - Using the Multiply Operator to Create Copies of Objects in Lists Python behaves unexpected when i append to a list, which is in another list. Here's an example: >>> _list = [[]] * 7 >>> _list [[], [], [], [], [], [], []] >>> _list[0].append("value") What i expect: >>> _list [['value'], [], [], [], [], [], []] What i get: >>> _list [['value'],

问题 Does anyone knows the limit of nested conditions (I mean conditions under another, several times)? In, let's say, Java and Visual Basic. I remembered when I was beginning with my developing trace, I make, I think 3 nested conditions in VB 6, and the compiler, just didn't enter the third one, now that I remember I never, knew the maximun nested coditions a language can take. 回答1: No limit should exist for a REAL programming language. For VB.NET and Java I would be shocked if there is any limit

问题 Does anyone knows the limit of nested conditions (I mean conditions under another, several times)? In, let's say, Java and Visual Basic. I remembered when I was beginning with my developing trace, I make, I think 3 nested conditions in VB 6, and the compiler, just didn't enter the third one, now that I remember I never, knew the maximun nested coditions a language can take. 回答1: No limit should exist for a REAL programming language. For VB.NET and Java I would be shocked if there is any limit

问题 Problem and Expected Results I'm using a proof of concept schema and DynamoDB Table setup to filter on nested field values. I've followed the ideas very generally here as well as the documentation for $utils.transform.toDynamoDBFilterExpression (here). The basic idea is this: using the same sort of principles, I'd like to filter by any arbitrarily deep nested field (short of the 32 document path length limit in DynamoDB). The relevant setup looks like this: AppSync schema (apologies for the

问题 I'm looking to lower my overhead on code like this foo(bar(baz("hello"))) // function hell ideally something like this var fbb = bind(foo, bar, baz) foo("hello") Does this exist? Native or library? I looked through underscore and bind. 回答1: Underscore has the compose function which will do what you want: var composite = _.compose(foo, bar, baz); composite('hello'); function foo(a1){ return 'foo' + a1; } function bar(a2){ return 'bar' + a2; } function baz(a3){ return 'baz' + a3; } alert(foo

问题 I've got an array with nested arrays, and I was trying to use the *search_array* function to sift through the array and give me back their keys. It hasn't been working. Here's the code: <?php $array = array( 'cat1' => array(1,2,3), 'cat2' => array(4,5,6), 'cat3' => array(7,8,9), ); foreach($array as $cat){ if(is_array($cat) echo array_search(5,$cat); //want it to return 'cat2' else echo array_search(5,$array); } Thanks! 回答1: If you always have a two-dimensional array, then it is as easy as:

问题 I am having a problem trying to deserialize a pretty complex nested dictionary type with interface values using Json.net. The code is located here "https://dotnetfiddle.net/JSoAug", and the types in question are: public class TypeConverter<T, TSerialized> : CustomCreationConverter<T> where TSerialized : T, new() { public override T Create(Type objectType) { return new TSerialized(); } } public interface IValue { Dictionary<string, IValue> SomeValues { get; set; } } public class Value : IValue

问题 I tried to solve almost same problem: "How to Expose a DependencyProperty of a Control nested in a UserControl?" The difference is that I have different (2 or more) nested Controls with of the same type . My goal is to make the nested DependencyProperties bindable. The main Problem I am facing is that Binding don't uses the the Getter and Setter of the CLR-Property but the String of the registererd DependencyProperty . With 2 (or more) nested Controls I am facing a naming conflict. To

问题 How to remove content in nested tags with BeautifulSoup ? These posts showed the reverse to retrieve the content in nested tags: How to get contents of nested tag using BeautifulSoup, and BeautifulSoup: How do I extract all the <li>s from a list of <ul>s that contains some nested <ul>s? I have tried .text but it only removes the tags >>> from bs4 import BeautifulSoup as bs >>> html = "<foo>Something something <bar> blah blah</bar> something</foo>" >>> bs(html).find_all('foo')[0] <foo