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Explain the use of a bit vector for determining if all characters are unique
... Cracking The Code Interview and my answer is related to this context.
In order to use this algorithm to solve the problem, we have to admit that we only are going to pass characters from a to z (lowercase).
As there is only 26 letters and these are properly sorted in the encoding table we use, t...
What is the difference between 'E', 'T', and '?' for Java generics?
...ollow the same name constraints as class names, field names, method names, etc. E.g. Foo<hello_world> is valid. Using a single upper-case letter is a naming standard, which is recommended in the Java Language Specification: "Type variable names should be pithy (single character if possible) ye...
How to sort an array of objects by multiple fields?
...
Here is a simple functional approach. Specify sort order using array. Prepend minus to specify descending order.
var homes = [
{"h_id":"3", "city":"Dallas", "state":"TX","zip":"75201","price":"162500"},
{"h_id":"4","city":"Bevery Hills", "state":"CA", "zip":"90210",...
How to set Sqlite3 to be case insensitive when string comparing?
...
----------------
b
sqlite> select Text_Value from Test order by Text_Value;
Text_Value
----------------
A
b
C
sqlite> select Text_Value from Test order by Text_Value desc;
Text_Value
----------------
C
b ...
Why are C++ inline functions in the header?
...ys to look at it:
Inline functions are defined in the header because, in order to inline a function call, the compiler must be able to see the function body. For a naive compiler to do that, the function body must be in the same translation unit as the call. (A modern compiler can optimize across ...
How to get an array of unique values from an array containing duplicates in JavaScript? [duplicate]
...
If you want to maintain order:
arr = arr.reverse().filter(function (e, i, arr) {
return arr.indexOf(e, i+1) === -1;
}).reverse();
Since there's no built-in reverse indexof, I reverse the array, filter out duplicates, then re-reverse it.
The ...
In Scala how do I remove duplicates from a list?
..., but be aware that by default, the Set interface doesn't preserve element order. You may want to use a Set implementation that explicitly does preserve order, such as collection.mutable.LinkedHashSet.
share
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Short circuit Array.forEach like calling break
...cause some returns true as soon as any of the callbacks, executed in array order, return true, short-circuiting the execution of the rest.
some, its inverse every (which will stop on a return false), and forEach are all ECMAScript Fifth Edition methods which will need to be added to the Array.proto...
Explanation of strong and weak storage in iOS5
... all remaining weak pointers will be zeroed out.
Perhaps an example is in order.
Imagine our object is a dog, and that the dog wants to run away (be deallocated).
Strong pointers are like a leash on the dog. As long as you have the leash attached to the dog, the dog will not run away. If five peo...
How can I calculate the number of lines changed between two commits in git?
...han what he mentions. Since git log internally calls the diff machinery in order to print requested information, you can give it any of the diff stat options - not just --shortstat. What you likely want to use is:
git log --author="Your name" --stat <commit1>..<commit2>
but you can us...