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How to find list of possible words from a letter matrix [Boggle Solver]
...();
}
$chars = "[^$chars]";
return qr/$chars/i;
}
# convert a plain cell ( ie: [x][y] = 0 )
# to an intelligent cell ie: [x][y] = object( x, y )
# we only really keep them in this format temporarily
# so we can go through and tie in neighbouring information.
# after th...
Asking the user for input until they give a valid response
... input_value = input("Please enter your age: ")
try:
# try and convert the string input to a number
age = int(input_value)
except ValueError:
# tell the user off
print("{input} is not a number, please enter a number only".format(input=input_value))
if age >...
Repeat each row of data.frame the number of times specified in a column
...q(nrow(df)), df$freq), 1:2]
The code for data.table is a tad cleaner:
# convert to data.table by reference
setDT(df)
df.expanded <- df[rep(seq(.N), freq), !"freq"]
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Difference between two dates in Python
... d2 = d2.strftime("%Y-%m-%d")
return abs((d2 - d1).days)
This will convert your datetime objects to strings but, two things
1) Trying to do d2 - d1 will fail as you cannot use the minus operator on strings and
2) If you read the first line of the above answer it stated, you want to use the ...
What new capabilities do user-defined literals add to C++?
...0101010101010101_bits");
}
The advantage is that a run-time exception is converted to a compile-time error.
You couldn't add the static assert to the bitset ctor taking a string (at least not without string template arguments).
...
How are virtual functions and vtable implemented?
...a vtable
Foo z = arg; // copy constructor Foo::Foo(const Foo&) will convert to Foo
z.a(); // non-virtual Foo::a, since z is a Foo, even if arg was not
}
The steps the hardware has to take are essentially the same, no matter whether the function is overwritten or not. The address of...
Accessing an SQLite Database in Swift
...nts. Declare Swift enums for discrete data types. Define your own database-convertible types.
Database Migrations
Speed: https://github.com/groue/GRDB.swift/wiki/Performance
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Split string into array of character strings
...
How would you convert cArray back to String?
– Bitmap
Jun 27 '11 at 8:19
...
What's the difference between std::move and std::forward
...orward, but one can add cv-qualifiers. Y can not be a type that is merely convertible from X, except via an accessible Base conversion.
If Y is an lvalue reference, the result will be an lvalue expression. If Y is not an lvalue reference, the result will be an rvalue (xvalue to be precise) expre...
JavaScript/jQuery to download file via POST with JSON data
...
It will corrupt binary files, because they get converted to strings using encoding, and result is not very close to original binary...
– Gobol
Feb 27 '17 at 7:40
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