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When to Redis? When to MongoDB? [closed]
...e, writing stupid sql statements... not just one but freaking everywhere. "select this, select that". But in particular you remember the irritating WHERE clause. Where lastname equals "thornton" and movie equals "bad santa." Urgh. You think, "why don’t those dbas just do their job and give me som...
How to build jars from IntelliJ properly?
...from IntelliJ:
Go to project structure:
Create a new artifact:
Select the main class, and be sure to change the manifest folder:
You have to change manifest directory:
<project folder>\src\main\java
replace "java" with "resources"
<project folder>\src\main\resources
...
Is SQL syntax case sensitive?
...
The SQL Keywords are case-insensitive (SELECT, FROM, WHERE, etc), but are often written in all caps. However in some setups table and column names are case-sensitive. MySQL has a configuration option to enable/disable it. Usually case-sensitive table and column na...
form with no action and where enter does not reload page
...ent (e.g. enter key) can bring you in trouble with textareas, and possibly selecting autocompletion or dropdowns, and mobile could be another source of trouble.
– luckydonald
Jun 10 at 15:34
...
How to check command line parameter in “.bat” file?
...tax of the command is incorrect.
But what do I get, when the number of "-characters "matches" (i.e. - is even), in such a case:
D:\>args bla2" "bla3
bla2" "bla3
Done.
NICE - I hope you learned something about how .bat files split their command line arguments (HINT: *It's not exactly like in ...
How to use querySelectorAll only for elements that have a specific attribute set?
I'm trying to use document.querySelectorAll for all checkboxes that have the value attribute set.
3 Answers
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How to clear a chart from a canvas so that hover events cannot be triggered?
...lt;canvas id="results-graph"><canvas>');
canvas = document.querySelector('#results-graph');
ctx = canvas.getContext('2d');
ctx.canvas.width = $('#graph').width(); // resize to parent width
ctx.canvas.height = $('#graph').height(); // resize to parent height
var x = canvas.width/2;...
MySQL: Sort GROUP_CONCAT values
... see http://dev.mysql.com/doc/refman/...tions.html#function_group-concat:
SELECT student_name,
GROUP_CONCAT(DISTINCT test_score ORDER BY test_score DESC SEPARATOR ' ')
FROM student
GROUP BY student_name;
share
...
Can't start site in IIS (use by another process)
...:80 and then watch for that Process Id (PID) in Task Manager with view->select columns-> process id checked. End that process, restart IIS and you are done. (Note: if you have Skype installed, try exiting that process first.)
In a modern Task Manager, you need to go on the Details tab to sear...
Efficient paging in SQLite with millions of records
...red field(s), and continue just after them when displaying the next page:
SELECT *
FROM MyTable
WHERE SomeColumn > LastValue
ORDER BY SomeColumn
LIMIT 100;
(This is explained with more detail on the SQLite wiki.)
When you have multiple sort columns (and SQLite 3.15 or later), you can use a ro...