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Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
...ull
IL_0002: stloc.0 // s
IL_0003: ldloc.0 // s
IL_0004: callvirt System.String.get_Length
IL_0009: call System.Console.WriteLine
It is the callvirt opcode that throws the NullReferenceException and it does that when the first argument on the evaluation stack is a null ...
How should a model be structured in MVC? [closed]
...understand MVC-like patterns in the context of PHP-based web applications. All the external links that are used in the content are there to explain terms and concepts, and not to imply my own credibility on the subject.
The first thing that I must clear up is: the model is a layer.
Second: there ...
How to revert multiple git commits?
...e git checkout -f A -- . Will not delete these, you will have to do it manually. I applied this strategy now, thanks Jakub
– oma
Mar 31 '11 at 14:56
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Difference between Mock / Stub / Spy in Spock test framework
... replacing a real one, returning something like null or 0 for each method call. You use a mock if you need a dummy instance of a complex class which would otherwise use external resources like network connections, files or databases or maybe use dozens of other objects. The advantage of mocks is tha...
console.log timestamps in Chrome?
...();
if (arguments.length)
{
// True array copy so we can call .splice()
var args = Array.prototype.slice.call(arguments, 0);
// If there is a format string then... it must
// be a string
if (typeof arguments[0] === "string")
{
// ...
module.exports vs exports in Node.js
...the same since you are not reassigning it. That is why this works
exports.foo = function() { ... }
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String difference in Bash
...u are in a bash session, you could do a:
diff <cmd1 <cmd2
diff <(foo | bar) <(baz | quux)
with < creating anonymous named pipes -- managed by bash -- so they are created and destroyed automatically, unlike temporary files.
So if you manage to isolate your two different string as p...
Why is extending native objects a bad practice?
...ody does it "the wrong way", and adds enumerable types to Object , practically destroying all loops on any object?
8 Answe...
django: BooleanField, how to set the default value to true?
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from django.db import models
class Foo(models.Model):
any_field = models.BooleanField(default=True)
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Why must we define both == and != in C#?
...tors is present, it will use the default reference equality operator, that all objects have, there is not an overload for it.1
Knowing that this is the case, the real question is: Why was this designed in this way and why doesn't the compiler figure it out on its own? A lot people are saying this ...