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Is it safe to ignore the possibility of SHA collisions in practice?
...rgued that any unlucky event with a probability lower than that is not actually very important.
If we have a "perfect" hash function with output size n, and we have p messages to hash (individual message length is not important), then probability of collision is about p2/2n+1 (this is an approximat...
Why should I use core.autocrlf=true in Git?
...y specific reasons to set autocrlf to true are:
avoid git status showing all your files as modified because of the automatic EOL conversion done when cloning a Unix-based EOL Git repo to a Windows one (see issue 83 for instance)
and your coding tools somehow depends on a native EOL style being pre...
Decimal precision and scale in EF Code First
...number of digits the db will store, regardless of where the decimal point falls and scale is the number of decimal places it will store.
Therefore there is no need to iterate through properties as shown but the can just be called from
public class EFDbContext : DbContext
{
protected override v...
Predicate in Java
...or any string that matches its given regular expression.
This is essentially an OOP abstraction for a boolean test.
For example, you may have a helper method like this:
static boolean isEven(int num) {
return (num % 2) == 0; // simple
}
Now, given a List<Integer>, you can process onl...
Viewing unpushed Git commits
... I've made, that haven't yet been pushed to the remote repository? Occasionally, git status will print out that my branch is X commits ahead of origin/master , but not always.
...
Count work days between two dates
... is not that advanced.
--Changing current database to the Master database allows function to be shared by everyone.
USE MASTER
GO
--If the function already exists, drop it.
IF EXISTS
(
SELECT *
FROM dbo.SYSOBJECTS
WHERE ID = OBJECT_ID(N'[dbo].[fn_WorkDays]')
AND XType IN (N'FN', N'I...
When to add what indexes in a table in Rails
...
Should I add "index" to all the foreign keys like "xxx_id"?
It would be better, because it accelerates the search in sorting in this column. And Foreign keys are something searched for a lot.
Since Version 5 of rails the index will be created aut...
i18n Pluralization
...orry but this just doesn't work with lots of languages. Pluralization is really complex, see translate.sourceforge.net/wiki/l10n/pluralforms Due to this I think that my answer is more appropriate.
– sorin
May 29 '11 at 6:55
...
What is a “cache-friendly” code?
...her end of the memory spectrum (DRAM), the memory is very cheap (i.e. literally millions of times cheaper) but takes hundreds of cycles after a request to receive the data. To bridge this gap between super fast and expensive and super slow and cheap are the cache memories, named L1, L2, L3 in decre...
Delete last char of string
...ve(strgroupids.Length - 1);
MSDN:
String.Remove(Int32):
Deletes all the characters from this string beginning at a specified
position and continuing through the last position
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