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Set every cell in matrix to 0 if that row or column contains a 0
... using the final row/column to store that information, so I was stuck with extra memory for a pair of Nx1 arrays.
– Dave Sherohman
Dec 8 '08 at 15:44
1
...
How to change letter spacing in a Textview?
...ntent.Context;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.ScaleXSpan;
import android.util.AttributeSet;
import android.widget.TextView;
public class LetterSpacingTextView extends TextView {
private float letterSpacing = LetterSpacing.BIGGEST;
...
Difference between pre-increment and post-increment in a loop?
...value.
++a is known as prefix.
add 1 to a, returns the new value.
C#:
string[] items = {"a","b","c","d"};
int i = 0;
foreach (string item in items)
{
Console.WriteLine(++i);
}
Console.WriteLine("");
i = 0;
foreach (string item in items)
{
Console.WriteLine(i++);
}
Output:
1
2
3
4
0...
What's the difference between an object initializer and a constructor?
...nstances of one or more other classes. For example see File.Create Method (String) (and its overloads) which creates a FileStream object.
– DavidRR
Jan 17 '18 at 18:13
add a c...
Run function from the command line
...function
This works because you are passing the command line argument (a string of the function's name) into locals, a dictionary with a current local symbol table. The parantheses at the end will make the function be called.
update: if you would like the function to accept a parameter from the c...
Rails: how do I validate that something is a boolean?
...
This does not work, as any string eg, "foo" will be converted into true.
– Ka Mok
Jun 4 '18 at 22:55
add a comment
...
Read an Excel file directly from a R script
...d to look at your numbers" ... what is the issue with "-" fields? does na.strings="-" address the problem? How many of these issues are generic and how many of them (e.g. numeric fields with commas) can be addressed with other tools such as XLConnect ...?
– Ben Bolker
...
Why Response.Redirect causes System.Threading.ThreadAbortException?
...ew Context)
{
User User = new User();
if (String.IsNullOrEmpty(model.EmailAddress))
ValidLogin = false; // no email address was entered
else
User = Db.FirstOrDefault(x => x.EmailAddress == model.EmailAddress);
...
Really Cheap Command-Line Option Parsing in Ruby
...eractive, "Be interactive"
opt :filename, "File to process", :type => String
end
And that's it. opts is now a hash with keys :quiet, :interactive, and :filename. You can do whatever you want with it. And you get a beautiful help page, formatted to fit your screen width, automatic short argume...
MySQL “NOT IN” query
... it is possible that the code responsible for EXISTS makes some kind of an extra check which takes extra time.
[…]
MySQL can optimize all three methods to do a sort of NESTED LOOPS ANTI JOIN.
[…]
However, these three methods generate three different plans which are executed by three di...