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Explaining Apache ZooKeeper
... simple: The server team with 3 servers has the majority and is allowed to select the new leader.
Even if you just have 3 servers and one of them fails the other 2 still form the majority and can agree that one of them will become the new leader.
I realize once you think about it some time and un...
How to change line-ending settings
...se GIT and in the "Line Ending Conversion" Section make sure that you have selected "Check out as is - Check in as is"option.
(2)and keep the remaining configurations as it is.
(3)once installation is done
(4)write all the file extensions which are converted to UNIX format into a text file (exten...
What do the f and t commands do in Vim?
...h occurrence of a given letter 100% correct. With v you can see the visual selection, a nice visual cue.
– Bentley4
Nov 27 '13 at 19:00
2
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Debug vs Release in CMake
... CXX)
Would compile .c files with g++. The link above also shows how to select a specific compiler for C/C++.
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PDO Prepared Inserts multiple rows in single query
... INSERT statements instead of building out as a single string query as the selected answer did. I decided to run a simple test with just two fields and a very basic insert statement:
<?php
require('conn.php');
$fname = 'J';
$lname = 'M';
$time_start = microtime(true);
$stmt = $db->prepare('...
Array slicing in Ruby: explanation for illogical behaviour (taken from Rubykoans.com)
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Read the slice syntax array[x,y] as "starting after x elements in array, select up to y elements". This is only meaningful if array has at least x elements.
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Proper way to use AJAX Post in jquery to pass model from strongly typed MVC3 view
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EDIT: had to use data: $('input, textarea, select').serialize(), for mine to work.
– TheGeekZn
Jul 30 '13 at 10:37
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LINQ OrderBy versus ThenBy
...e,
o.InvoiceOwner.FirstName,
o.InvoiceID
select o;
If you call OrderBy multiple times, it will effectively reorder the sequence completely three times... so the final call will effectively be the dominant one. You can (in LINQ to Objects) write
foo.OrderBy(x).O...
How to change the foreign key referential action? (behavior)
...r, so I wrote something to make the statements for me. Figured I'd share:
SELECT
CONCAT('ALTER TABLE `' ,rc.TABLE_NAME,
'` DROP FOREIGN KEY `' ,rc.CONSTRAINT_NAME,'`;')
, CONCAT('ALTER TABLE `' ,rc.TABLE_NAME,
'` ADD CONSTRAINT `' ,rc.CONSTRAINT_NAME ,'` FOREIGN KEY (`',kcu.COLUMN_NAME,
...
What is a lambda (function)?
...tual SQL to execute using expression trees.
The statement above becomes:
select ... from [tablename]
where [FieldName] > 15 --this line was 'read' from the lambda function
This is different from normal methods or anonymous delegates (which are just compiler magic really) because they ca...