I'm using Mono.Cecil (0.9.5.4) to inject code into some of my assemblies. Some of the calls I need to make are to objects in the System.ComponentModel namespace. How can I find those 'MethodReferences' that I need to call?
What I tried:
AssemblyDefinition assembly = AssemblyDefinition.ReadAssembly(dllPath);
var objectModelRef = assembly.MainModule.AssemblyReferences.First(i => i.Name == "System.ObjectModel")
var objectModelAssembly = assembly.MainModule.AssemblyResolver.Resolve(objectModelRef);
But then objectmodelAssembly.MainModule.Types has no actual types in it.
I also tried this:
AssemblyDefinition assembly = AssemblyDefinition.ReadAssembly(dllPath);
var system = new DefaultAssemblyResolver().Resolve("System");
var objectIWantToInject = assembly.MainModule.Import(FindType(...));
This works fine on a machine with the full .net 4.5 installed. But since my assembly is a PCL, when I try executing on WinPhone, I get FileNotFound for 'System'.
So if I wanted to get an instance of TypeDefinition for System.ComponentModel.ProgressChangedEventArgs that I could then make calls to some of the methods on, how would I?
In your code:
AssemblyDefinition assembly = AssemblyDefinition.ReadAssembly(dllPath);
var system = new DefaultAssemblyResolver().Resolve("System");
var objectIWantToInject = assembly.MainModule.Import(FindType(...));
I think you are missing at least one import, e.g.
assembly.MainModule.Import(typeof(System.ObjectModel);
I believe you will also need to "Resolve" it to walk further down the tree.
Here is a working sample for anyone that is feeling the same pain:
assembly.MainModule.Import(typeof(string));
var methodBaseRef = assembly.MainModule.Import(typeof(System.Reflection.MethodBase));
var getMemberInfo = assembly.MainModule.Import(typeof(System.Reflection.MemberInfo));
var getMemberInfoResolver = getMemberInfo.Resolve();
var getCurrentMethodRef = assembly.MainModule.Import(typeof(System.Reflection.MethodBase).GetMethod("GetCurrentMethod"));
var get_DeclaringType = assembly.MainModule.Import(getMemberInfoResolver.Methods.Single(m => m.Name == "get_DeclaringType"));
var getTypeInfo = assembly.MainModule.Import(typeof(Type));
var name = assembly.MainModule.Import(typeof(Type).GetMethod("Name"));
Related
I'm new to node js programming and I have the following :
var myObj = {
AD: '{+376}',
AF: '{+93}',
AG: '{+1268}'
};
NOTE: I cannot modify this object data, as it comes from a third party component. I have only put an example of what data is returned to me in a local object for debugging purposes.
I'd like to be able to search this object for "AD" and pull out just the +376 from this line
"AD": "{+376}"
this does not seem to work:
var i = myObj.indexOf("AD");
console.log(i);
UPDATE
Sorry... I was using stringify on the object and the output I was seeing in the terminal window was wrong... I have corrected the question
UPDATE again
OK... running it using myObj works in a local sandbox... but using it on the actual data that comes back from the NPM object does not. Here is a RunKit:
https://npm.runkit.com/country-codes-list
This code does returns the number...
var ccl = require("country-codes-list")
var l = ccl.customList('countryCode', '+{countryCallingCode}');
console.log(l.AD);
BUT I need a variable instead of .AD like this:
var ad = 'AD'
var ccl = require("country-codes-list")
var l = ccl.customList('countryCode', '+{countryCallingCode}');
console.log(l.ad); // doesn't work !
This should work.
var ad = 'AD'
var ccl = require("country-codes-list")
var l = ccl.customList('countryCode', '+{countryCallingCode}');
console.log(l[ad]);
You can use the key to reach for the value.
var string = '{"AD":"{+376}","AF":"{+93}","AG":"{+1268}"}';
var object = JSON.parse(string);
function search(id) {
return object[id];
}
console.log(search('AD')) //--> {+376}
I have problem using all 3 of the packages together. I define them like this:
var moment = require('moment-timezone');
var momentRange = require('moment-range');
And when I want to use the moment-range functions, I'm trying to call it like this:
var range1 = momentRange.range(moment("string1"), moment("string2"));
And I'm getting error: TypeError: momentRange.range is not a function
What am I doing wrong?
According to the documentation, you are supposed to use the moment-range library to first extend the core moment library itself, then use moment.range because the moment-range package adds additional functions to the moment object:
var momentRange = require('moment-range');
momentRange.extendMoment(moment);
moment.range(moment(…), moment(…)); // Now usable
Specifically, in their documentation:
CommonJS:
const Moment = require('moment');
const MomentRange = require('moment-range');
const moment = MomentRange.extendMoment(Moment);
I'm looking at the sources of the #slack/client npm package for NodeJs and see that right at the top they have this:
var forEach = require('lodash').forEach;
var bind = require('lodash').bind;
var has = require('lodash').has;
var isArray = require('lodash').isArray;
var isEmpty = require('lodash').isEmpty;
var isObject = require('lodash').isObject;
What's the point in cherry picking all this from the lodash module when you can make it more succinct by only including the whole lib once and then using the methods you need?
// Include the whole lib
var _ = require('lodash');
// And later
if (_.isObject(...)) // etc
It's not like they are using each method many times. In fact, most are used just once or twice. Also, it is my understanding that even when partially requiring part of a module, the whole thing is eval()'d, so there is no advantage memory or performance-wise.
I find this package to be very well written so I'm curious to know why they chose to do this.
I'm using a pretty barebones expressjs app and want to add a library/helper to store some useful code. Ideally, I'd like it to work as a module. However, I'm unable to get it to work. Here's what I've got:
// helpers/newlib.js
var NewLib = function() {
function testing() {
console.log("test");
}
};
exports.NewLib = NewLib;
.
// controllers/control.js
var newlib = require('../helpers/newlib').NewLib;
var helper = new NewLib();
helper.testing();
.
The error I get is ReferenceError: NewLib is not defined. I followed the design pattern (of how exports works) based on another simple module I downloaded.
What am I doing wrong?
There are two problems with your code.
First, you are assigning the NewLib function from helpers/newlib.js to newlib var, so you should use new newlib() not new NewLib():
// controllers/control.js
var newlib = require('../helpers/newlib').NewLib;
var helper = new newlib(); // <--- newlib, not NewLib
helper.testing();
Or you can rename your variable to NewLib:
// controllers/control.js
var NewLib = require('../helpers/newlib').NewLib;
var helper = new NewLib(); // <--- now it works
helper.testing();
Second, the testing function is not accessible outside the constructor scope. You can make it accessible by assigning it to this.testing for instance:
// helpers/newlib.js
var NewLib = function() {
this.testing = function testing() {
console.log("test");
}
};
I can't seem to find what to use instead of this, but here's what I had before:
using ServiceStack.Common.Utils;
...
public Profile Put(ProfileUpdate req) {
var cred = this.GetCredential();
this.AskUser();
var data = Db.GetById<Profile>(cred.UserId);
ReflectionUtils.PopulateObject<Profile, ProfileUpdatable>(data, req);
Now I can't find where Utils or ReflectionUtils or PopulateObject has gone in version 4.0.20
Those functions have been replaced with these auto mapping functions, documented here.
So you would use:
var data = Db.GetById<Profile>(cred.UserId);
data.PopulateWith(req);