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What's the difference between echo, print, and print_r in PHP?
...ngs are not quoted, type information is omitted, array sizes aren't given, etc.
var_dump is usually more useful than print_r when debugging, in my experience. It's particularly useful when you don't know exactly what values/types you have in your variables. Consider this test program:
$values = ar...
Display a float with two decimal places in Python
...ut the values in a string with two decimal places (5 -> 5.00, 5.5 -> 5.50, etc). How can I do this in Python?
11 Answers
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Why use prefixes on member variables in C++ classes
...wish to make the type clear, I use standard suffixes (e.g. List, ComboBox, etc).
This makes the programmer aware of the usage of the variable whenever they see/use it. Arguably the most important case is "p" for pointer (because the usage changes from var. to var-> and you have to be much more c...
How do you get the list of targets in a makefile?
...a 20), those where you can optionally install it (e.g., Ubuntu 14, with . /etc/bash_completion), and those that don't support it at all (e.g., OSX 10.9)
– mklement0
Oct 13 '14 at 11:23
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How to manage local vs production settings in Django?
...local development and the production server? Some of them (like constants, etc) can be changed/accessed in both, but some of them (like paths to static files) need to remain different, and hence should not be overwritten every time the new code is deployed.
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Real mouse position in canvas [duplicate]
....
var canvas = document.getElementById("imgCanvas");
var context = canvas.getContext("2d");
function draw(evt) {
var pos = getMousePos(canvas, evt);
context.fillStyle = "#000000";
context.fillRect (pos.x, pos.y, 4, 4);
}
Note: borders and padding will affect position if applied direc...
What do I need to read to understand how git works? [closed]
...stored, how are versions kept and how do changes happen (branches, merges, etc.)?
15 Answers
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Replacing all non-alphanumeric characters with empty strings
...e second one doesn't answer the question. What about characters like : / \ etc?
– WW.
Dec 29 '14 at 4:03
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Why is it not advisable to have the database and web server on the same machine?
...xtra cost, dedicated network connection between the two, more maintenance, etc.), especially for a small application, where neither piece is using too much CPU or memory? Even with two servers, with one server compromised, an attacker could still do serious damage, either by deleting the database, ...
Repair all tables in one go
...E CONTINUE HANDLER FOR SQLSTATE '02000' SET endloop=1;
OPEN rCursor;
FETCH rCursor INTO tableName;
WHILE endloop = 0 DO
SET @sql = CONCAT("REPAIR TABLE `", tableName, "`");
PREPARE statement FROM @sql;
EXECUTE statement;
FETCH rCursor INTO tableName;
END WHILE;
CLOSE rC...