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Boolean literals in PowerShell
...valent.
Note: Never expect that string literal true can get automatically converted to boolean. For example, if I run the below command:
installmyapp.ps1 -cleanuprequired true
it fails to execute the script with the below error:
Cannot process argument transformation on parameter 'cleanupreq...
Kotlin secondary constructor
...ctory method next to your class
fun C(s: String) = C(s.length)
class C(a: Int) { ... }
usage:
val c1 = C(1) // constructor
val c2 = C("str") // factory method
Technique 2. (may also be useful) Define default values for parameters
class C(name: String? = null) {...}
usage:
val c1 = C("foo")...
Does the default constructor initialize built-in types?
...mple, if your class has no user-declared constructor
class C {
public:
int x;
};
then the compiler will implicitly provide one. The compiler-provided constructor will do nothing, meaning that it will not initialize C::x
C c; // Compiler-provided default constructor is used
// Here `c.x` conta...
SQL Server IN vs. EXISTS Performance
...an overall large result set).
I believe the optimizer is smart enough to convert between "in" vs "exists" when there is a significant cost difference due to (1) and (2), otherwise it may just be used as a hint (e.g. exists to encourage use of an a seekable index on the right side).
Both forms c...
How can I remove a pytz timezone from a datetime object?
...you are using a library like arrow, then you can remove timezone by simply converting an arrow object to to a datetime object, then doing the same thing as the example above.
# <Arrow [2014-10-09T10:56:09.347444-07:00]>
arrowObj = arrow.get('2014-10-09T10:56:09.347444-07:00')
# datetime.date...
passing argument to DialogFragment
...
Using newInstance
public static MyDialogFragment newInstance(int num) {
MyDialogFragment f = new MyDialogFragment();
// Supply num input as an argument.
Bundle args = new Bundle();
args.putInt("num", num);
f.setArguments(args);
return f;
}
And get the Args l...
How can I get Git to follow symlinks?
...
$ git add src/main/path/ConvertSymlinkToDir fatal: 'src/main/path/ConvertSymlinkToDir' is beyond a symbolic link
– user1767316
Jul 21 '17 at 14:04
...
How do you allow spaces to be entered using scanf?
...put.
Use fgets() (which has buffer overflow protection) to get your input into a string and sscanf() to evaluate it. Since you just want what the user entered without parsing, you don't really need sscanf() in this case anyway:
#include <stdio.h>
#include <stdlib.h>
#include <string...
Multidimensional Array [][] vs [,] [duplicate]
...ow and column, which gets you down to a single double:
double[,] ServicePoint = new double[10,9];
ServicePoint[0]... // <-- meaningless, a 2d array can't use just one index.
UPDATE:
To clarify based on your question, the reason your #1 had a syntax error is because you had this:
double[][] ...
What is the maximum depth of the java call stack?
How deep do I need to go into the call stack before I get a StackOverflowError? Is the answer platform dependent?
4 Answers...