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LINQ to SQL Left Outer Join
...s? I fail to see how any of those keywords magically makes it a left join. What does the "into sr" do? Linq frustrates me sometimes :)
– Joe Phillips
Apr 7 '14 at 21:29
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Mysql error 1452 - Cannot add or update a child row: a foreign key constraint fails
... @AbuSadatMohammedYasin no it shouldn't: the question asked "what is going on" and this answer simply doesn't attempt to explain it. As cs_alumnus mentioned, there's a bigger problem: all the new values that should be referencing another value in the other table (as a Foreign key shoul...
Smallest data URI image possible for a transparent image
...3Csvg xmlns='http://www.w3.org/2000/svg'/%3E
The final length depends on what it's gzipped with.
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How do you set the Content-Type header for an HttpClient request?
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I will eventually figure out what object type "req" is ... by trial and error........BUT it would be great to show that. Thank you for your consideration.
– granadaCoder
Dec 21 '18 at 15:38
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'is' versus try cast with null check
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There's no information yet about what actually happens below the belt. Take a look at this example:
object o = "test";
if (o is string)
{
var x = (string) o;
}
This translates to the following IL:
IL_0000: nop
IL_0001: ldstr "test"
I...
How do I pass a method as a parameter in Python
...ToRun(spam_value, ham=ham_value)
If you don't know, when writing method2, what arguments methodToRun is going to take, you can also use argument unpacking to call it in a generic way:
def method1(self, spam, ham):
return 'hello ' + str(spam) + ' and ' + str(ham)
def method2(self, methodToRun, ...
Why does InetAddress.isReachable return false, when I can ping the IP address?
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This is identical to what InetAddress.isReachable() already does, via port 7, except that the latter is more intelligent about what the various possible IOExceptions mean in terms of reachability.
– Marquis of Lorne
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Python (and Python C API): __new__ versus __init__
...f __new__ and __init__? , but regardless, it's still unclear to me exactly what the practical difference between __new__ and __init__ is.
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python multithreading wait till all threads finished
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say t1 takes the longest, but t2 has an exception. what happens then? can you catch that exception or check whether t2 finished ok or not?
– Ciprian Tomoiagă
May 4 '14 at 15:27
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Return type of '?:' (ternary conditional operator)
...on can be an lvalue or an rvalue. This is its value category. (This is somewhat of a simplification, in C++11 we have lvalues, xvalues and prvalues.)
In very broad and simple terms, an lvalue refers to an object in memory and an rvalue is just a value that may not necessarily be attached to an objec...