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Randomize a List
What is the best way to randomize the order of a generic list in C#? I've got a finite set of 75 numbers in a list I would like to assign a random order to, in order to draw them for a lottery type application.
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How to print Boolean flag in NSLog?
...@ changes as follows
For Strings you use %@
For int you use %i
For float and double you use %f
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Verify a certificate chain using openssl verify
...ot CA needs to self signed for verify to work. This is why your second command didn't work. Try this instead:
openssl verify -CAfile RootCert.pem -untrusted Intermediate.pem UserCert.pem
It will verify your entire chain in a single command.
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Does a const reference class member prolong the life of a temporary?
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Only local const references prolong the lifespan.
The standard specifies such behavior in §8.5.3/5, [dcl.init.ref], the section on initializers of reference declarations. The reference in your example is bound to the constructor's argument n, and becomes invalid when the object n...
What languages are Windows, Mac OS X and Linux written in?
... was just wondering who knows what programming languages Windows, Mac OS X and Linux are made up from and what languages are used for each part of the OS (ie: Kernel, plug-in architecture, GUI components, etc).
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Why doesn't Java allow generic subclasses of Throwable?
...; e) {
// ignore that
} catch (SomeException<String> e) {
crashAndBurn()
}
Both SomeException<Integer> and SomeException<String> are erased to the same type, there is no way for the JVM to distinguish the exception instances, and therefore no way to tell which catch block s...
'typeid' versus 'typeof' in C++
I am wondering what the difference is between typeid and typeof in C++. Here's what I know:
6 Answers
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Concatenating Files And Insert New Line In Between Files
...ke sure the file finalfile.txt does not exist before you run the above command.
If you are allowed to use awk you can do:
awk 'FNR==1{print ""}1' *.txt > finalfile.txt
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Android- create JSON Array and JSON Object
How can I create a JSON with this format in Android:
Since the API that I will be passing will parse JsonArray then the object.
Or would it be okay if just to pass a json object? Since I will just have to insert 1 transaction per service call.
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How to convert Set to Array?
... out in an array
let array = [...mySet];
The old fashion way, iterating and pushing to a new array (Sets do have forEach)
let array = [];
mySet.forEach(v => array.push(v));
Previously, using the non-standard, and now deprecated array comprehension syntax:
let array = [v for (v of mySet)];
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