field

问题 I have a base class, say BassClass , with some fields, which I made them protected, and some pure virtual functions. Then the derived class, say DerivedClass , like class DerivedClass : public BassClass . Shouldn't DerivedClass inherit the protected fields from BassClass? When I tried to compile the DerivedClass, the compiler complains that DerivedClass does NOT have any of those fields, what is wrong here? thanks 回答1: If BassClass (sic) and DerivedClass are templates, and the BassClass

问题 I have a base class, say BassClass , with some fields, which I made them protected, and some pure virtual functions. Then the derived class, say DerivedClass , like class DerivedClass : public BassClass . Shouldn't DerivedClass inherit the protected fields from BassClass? When I tried to compile the DerivedClass, the compiler complains that DerivedClass does NOT have any of those fields, what is wrong here? thanks 回答1: If BassClass (sic) and DerivedClass are templates, and the BassClass

问题 I am in a mobile app and I use an input field in order user submit a number. When I go back and return to the page that input field present the latest number input displayed at the input field. Is there any way to clear the field every time the page load? $('#shares').keyup(function(){ payment = 0; calcTotal(); gtotal = ($('#shares').val() * 1) + payment; gtotal = gtotal.toFixed(2); $("p.total").html("Total Payment: <strong>" + gtotal + "</strong>"); }); 回答1: You can clear the input field by

问题 I have module which has three fields •name •first name •last name When a user press save The first name and last name will concatenate and displayed in name field. Name Field must be in read only mode. def onchange_name(self, cr, uid, ids, firstname, lastname, context=None): value = {'fullname' : True} if firstname and lastname: value['fullname'] = firstname + " " +lastname return {'value': value} <field name="fullname" readonly="True" on_change="onchange_fullname(fullname,context)"/> <field

问题 I wish to expand a structure ( bac ) with a number of fields from another structure ( BT ). The names of these fields are contained in the cell array ( adds ) as strings. this is what i have now (and obviously doesn't do the job, explaining this post): for i=1:numel(adds) eval(genvarname('bac.',adds{i})) = eval(strcat('BT.',adds{i})); end I also tried using sprintf , which did not seem to work for me. I feel confident one of you knows how to do it, since I feel it should be rather easy. 回答1:

问题 I wish to expand a structure ( bac ) with a number of fields from another structure ( BT ). The names of these fields are contained in the cell array ( adds ) as strings. this is what i have now (and obviously doesn't do the job, explaining this post): for i=1:numel(adds) eval(genvarname('bac.',adds{i})) = eval(strcat('BT.',adds{i})); end I also tried using sprintf , which did not seem to work for me. I feel confident one of you knows how to do it, since I feel it should be rather easy. 回答1:

问题 In D, I'm trying to create an enum whose members have members. I can better explain what I'm trying to do with an example, where s and i stand in for the sub-members I'm trying to create: In Python, I can do this: class Foo(enum.Enum): A = "A string", 0 B = "B string", 1 C = "C string", 2 def __init__(self, s, i): self.s = s self.i = i print(Foo.A.s) Java can do something like this: public enum Foo { A("A string", 0), B("B string", 1), C("C string", 2); private final String s; private final

问题 This question is inspired by Jon Skeet's answer: Is there a c# equivalent to c++'s access-modifier regions He makes a comment that it is possible for the order of fields in a file to matter. I am guessing that this has to do with the order that the fields are initialized, but I think it's a dangerous enough thing to code based on this side effect that it warranted its own question and discussion. Are there other thoughts around how the order of fields within your code file could be

问题 This question is inspired by Jon Skeet's answer: Is there a c# equivalent to c++'s access-modifier regions He makes a comment that it is possible for the order of fields in a file to matter. I am guessing that this has to do with the order that the fields are initialized, but I think it's a dangerous enough thing to code based on this side effect that it warranted its own question and discussion. Are there other thoughts around how the order of fields within your code file could be

问题 In Scapy, I want to compare a number of header fields between any two packets a and b . This list of fields is predefined, say: fieldsToCompare = ['tos', 'id', 'len', 'proto'] #IP header Normally I would do it individually: if a[IP].tos == b[IP].tos: ... do stuff... Is there any way to access those packet fields from a list of strings including what each one of them is called? Like: for field in fieldsToCompare: if a[IP].field == b[IP].field: ... do stuff... 回答1: You can use getattr(). These