nested

问题 I'm trying to implement something in ply, which I'm very new to, based on what I have done in pyparsing, which I'm also quite new to. How can I write a simple nesting search such as this: thecontent = pyparsing.Word(pyparsing.alphanums) | '&' | '|' parens = pyparsing.nestedExpr( '(', ')', content=thecontent) By using PLY? 回答1: What you have written in pyparsing does not translate well to PLY because, well, it's barely even a parser. nestedExpr is a helper for quickly defining an expression of

问题 I am using SQLAlchemy in Python and am declaring my classes inheriting from a declarative base as follows: from sqlalchemy import Column, Integer, String from sqlalchemy.ext.declarative import declarative_base Base = declarative_base() class SomeClass(Base): __tablename__ = 'some_table' id = Column(Integer, primary_key=True) name = Column(String(50)) As a user I would like to define the __tablename__ as a parameter, and not a hard-coded value , something like this: class SomeClass(Base): _

问题 If I have a vector in C++, I know I can safely pass it as an array (pointer to the contained type): void some_function(size_t size, int array[]) { // impl here... } // ... std::vector<int> test; some_function(test.size(), &test[0]); Is it safe to do this with a nested vector? void some_function(size_t x, size_t y, size_t z, int* multi_dimensional_array) { // impl here... } // ... std::vector<std::vector<std::vector<int> > > test; // initialize with non-jagged dimensions, ensure they're not

问题 i'm writing the following SQL query for my Postgres database: SELECT( (SELECT count(*) as A FROM merchant WHERE nome LIKE 'A%'), (SELECT count(*) as B FROM merchant WHERE nome LIKE 'B%'), (SELECT count(*) as C FROM merchant WHERE nome LIKE 'C%'), (SELECT count(*) as D FROM merchant WHERE nome LIKE 'D%'), (SELECT count(*) as E FROM merchant WHERE nome LIKE 'E%'), (SELECT count(*) as F FROM merchant WHERE nome LIKE 'F%'), (SELECT count(*) as G FROM merchant WHERE nome LIKE 'G%'), (SELECT count(

问题 I have looked through countless examples which indicate that this is supposed to work, but it does not. I was wondering if someone could have a look and indicate why. I am trying to access the variable "dia" from within the setTimeout function, but it always returns undefined: var dialogue = new Array(); dialogue[0] = 'Hi there Mo, I am Mark. I will be guiding through the game for you today'; dialogue[1] = 'Hey there Mark, how you doing?'; dialogue[2] = 'I am doing fine sweetie pie, how about

问题 I have looked through countless examples which indicate that this is supposed to work, but it does not. I was wondering if someone could have a look and indicate why. I am trying to access the variable "dia" from within the setTimeout function, but it always returns undefined: var dialogue = new Array(); dialogue[0] = 'Hi there Mo, I am Mark. I will be guiding through the game for you today'; dialogue[1] = 'Hey there Mark, how you doing?'; dialogue[2] = 'I am doing fine sweetie pie, how about

问题 I recently looked for a way to correctly create and use nested hashes in Ruby. I promptly found a solution by Paul Morie, who answered his own question: hash = Hash.new { |h,k| h[k] = {} } I promptly went to use this and am glad to report it works. However, as the title says, I'd like the "secondary", "inside" hashes to return 0 by default . I'm aware that you can define the default return value of a hash both in its constructor (" Hash.new(0) ") or using .default (" hash.default(0) "). But

问题 I have a nested loop: {{$columns := .columns}} {{range $dx := .dataList}} {{range $c := $columns}} {{index $dx $c}} {{end}} {{end}} dataList is the orm model array. With ID, Title fields , then columns is the []string variable contains all orm model field names like ID, Title . type AdFile struct { ID uint `gorm:"primary_key"` Title string } I've tried with {{(index .listData 0).Title}} and it works. But if i want to access $dx.Title , $dx.ID .... with Title , ID as variables, but it doesn't

问题 Doing research for ASPOSE.Words. Everything works fine just last thing remains. Question is how to render table inside table? In the Nested table documentation sample data is tightly coupled with presentation layer. I need separation of data and presentation layer. So little test here: [Test] public void CreateDocumentRecurentalTableInTableTest() { // Structural items are in [], values/data in {} //GIVEN (presentation layer) const string FileName = "_6CreateDocumentRecurentalTableInTableTest

问题 If I have the following Python class: class Test(object): funcs = { "me" : "action", "action": "action", "say" : "say", "shout" : "say" } def dispatch(self, cmd): def say: print "Nested Say" def action: print "Nested Action" # The line below gets the function name as a string, # How can I call the nested function based on the string? Test.funcs.get(cmd, "say") I would like to be able to do the following: >>> Test().dispatch("me") Nested Action >>> Test().dispatch("say") Nested Say Any