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how to calculate binary search complexity
... formula this would be this:
1 = N / 2x
multiply by 2x:
2x = N
now do the log2:
log2(2x) = log2 N
x * log2(2) = log2 N
x * 1 = log2 N
this means you can divide log N times until you have everything divided. Which means you have to divide log N ("do the bin...
Hidden features of Ruby
Continuing the "Hidden features of ..." meme, let's share the lesser-known but useful features of Ruby programming language.
...
MySQL SELECT only not null values
...uld use IS NOT NULL. (The comparison operators = and <> both give UNKNOWN with NULL on either side of the expression.)
SELECT *
FROM table
WHERE YourColumn IS NOT NULL;
Just for completeness I'll mention that in MySQL you can also negate the null safe equality operator but this is not sta...
How to create .ipa file using Xcode?
...validate your archive by pressing Validate (optional step but recommended)
Now press on Export button
This will open list of method for export. Select the export method as per your requirement and click on Next button.
This will show list of team for provisioning. Select accordingly and p...
How can I find the number of days between two Date objects in Ruby?
...conds, such as this example
2.0.0-p195 :017 > a_date_time = DateTime.now
=> #<DateTime: 2013-12-31T12:23:03-08:00 ((2456658j,73383s,725757000n),-28800s,2299161j)>
2.0.0-p195 :018 > b_date_time = DateTime.now-20
=> #<DateTime: 2013-12-11T12:23:06-08:00 ((2456638j,73386s,699...
How do you detect/avoid Memory leaks in your (Unmanaged) code? [closed]
...
Valgrind also now works on OS X, so linux is not your only option.
– Michael Anderson
Oct 12 '10 at 3:01
1
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Error during installing HAXM, VT-X not working
...re-assisted Virtualization" ("activer l'assistance a la virtualisation").
Now restart your computer and re-install the Intel's HAXM which can be found under ~SDK_LOCATION\extras\intel\Hardware_Accelerated_Execution_Manager. You can also manually download the standalone HAXM installer from Intel's w...
How to disallow temporaries
...see Johannes Schaub's Comment and ensuing discussion below: "How can you know that it is source compatible with existing code? His friend includes his header and has void f() { int Foo = 0; } which previously compiled fine and now miscompiles! Also, every line that defines a member function of clas...
AutoLayout with hidden UIViews?
... this as the accepted answer? It's been available for three release cycles now.
– Ryan Romanchuk
Feb 13 '18 at 6:02
1
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How to convert a char array back to a string?
...
@A.H. I don't know about that. String gave way to StringBuffer which gave way to StringBuilder. I bet StringBuffer proponents said the same thing then, and now have to refactor code to use StringBuilder.
– corsiKa
...