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Generating random whole numbers in JavaScript in a specific range?
...- min)
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x (what we need)
So, in order to find x, we would do:
x = Math.random() * (max - min);
Don't forget to add min back, so that we get a number in the [min, max) interval:
x = Math.random() * (max - min) + min;
That was the first function from MD...
Why does direction of index matter in MongoDB?
...me way and uses it as the key in a BTree.
When finding single items - The order of the nodes in the tree is irrelevant.
If you are returning a range of nodes - The elements close to each other will be down the same branches of the tree. The closer the nodes are in the range the quicker they can b...
Difference between Eclipse Europa, Helios, Galileo
...d how the names of the last three and the next release are in alphabetical order (Galileo, Helios, Indigo, Juno)? This is probably how they will go in the future, in the same way that Ubuntu release codenames increase alphabetically (note Indigo is not a moon of Jupiter!).
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List of all index & index columns in SQL Server DB
... = 0
AND ind.is_unique_constraint = 0
AND t.is_ms_shipped = 0
ORDER BY
t.name, ind.name, ind.index_id, ic.is_included_column, ic.key_ordinal;
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How to remove all debug logging calls before building the release version of an Android app?
... final boolean DEBUG_STARTING_WINDOW = false;
static final boolean DEBUG_REORDER = false;
static final boolean DEBUG_WALLPAPER = false;
static final boolean SHOW_TRANSACTIONS = false;
static final boolean HIDE_STACK_CRAWLS = true;
static final boolean MEASURE_LATENCY = false;
With corresponding co...
What is the optimal length for user password salt? [closed]
Any salt at all will obviously help when salting and hashing a user's password. Are there any best practices for how long the salt should be? I'll be storing the salt in my user table, so I would like the best tradeoff between storage size and security. Is a random 10 character salt enough? Or ...
Templated check for the existence of a class member function?
...rer. Other benefits are the fact that has_toString can be passed to higher order algorithms and it can also be defined at function scope, so there is no need to pollute the namespace scope with implementation details.
Boost.TTI
Another somewhat idiomatic toolkit to perform such a check - even thoug...
Laravel Eloquent Sum of relation's column
...The documentation is a little light for some of the Collection methods but all the query builder aggregates are seemingly available besides avg() that can be found at http://laravel.com/docs/queries#aggregates.
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Is the order of elements in a JSON list preserved?
I've noticed the order of elements in a JSON object not being the original order.
5 Answers
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Is main() really start of a C++ program?
... don't have full control prior to main, you don't have full control on the order in which the static blocks get initialized.
After main, your code is conceptually "fully in control" of the program, in the sense that you can both specify the instructions to be performed and the order in which to per...