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Blocks and yields in Ruby
...ic language, this sort of thing will look familiar. This is how you read a file in java
public class FileInput {
public static void main(String[] args) {
File file = new File("C:\\MyFile.txt");
FileInputStream fis = null;
BufferedInputStream bis = null;
DataInputStream dis = nul...
How to change Rails 3 server default port in develoment?
...with Rails 3 gems installed from the root of your application.
APP_PATH = File.expand_path('../../config/application', __FILE__)
require File.expand_path('../../config/boot', __FILE__)
# THIS IS NEW:
require "rails/commands/server"
module Rails
class Server
def default_options
super....
Why is Git better than Subversion?
...perately needs this command, considering how frequently it will dump extra files on your disk.
Git has the 'bisect' command. It's nice.
SVN creates .svn directories in every single folder (Git only creates one .git directory). Every script you write, and every grep you do, will need to be written to...
Delete all lines beginning with a # from a file
All of the lines with comments in a file begin with # . How can I delete all of the lines (and only those lines) which begin with # ? Other lines containing # , but not at the beginning of the line should be ignored.
...
How can I remove duplicate rows?
... no nulls, you GROUP BY the unique columns, and SELECT the MIN (or MAX) RowId as the row to keep. Then, just delete everything that didn't have a row id:
DELETE FROM MyTable
LEFT OUTER JOIN (
SELECT MIN(RowId) as RowId, Col1, Col2, Col3
FROM MyTable
GROUP BY Col1, Col2, Col3
) as KeepRow...
Git repository broken after computer died
... some local and remote branches (somehow the .git/refs/remotes/origin/HEAD file remained in an inconsistent state). Changing the contents of the above mentioned file to point to an existent local branch (e.g ref: refs/remotes/origin/master) solved this problem. Still, the above approach might be bet...
How can I rename a field for all documents in MongoDB?
...rmer way:
remap = function (x) {
if (x.additional){
db.foo.update({_id:x._id}, {$set:{"name.last":x.name.additional}, $unset:{"name.additional":1}});
}
}
db.foo.find().forEach(remap);
In MongoDB 3.2 you can also use
db.students.updateMany( {}, { $rename: { "oldname": "newname" } } )
T...
What is the purpose of the '@' symbol in CSS?
...
@media print{ /* Are you trying to print a video or audio file?? */ }
– kurdtpage
Mar 18 '15 at 22:32
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How to get folder path for ClickOnce application
I need to write a file in the same folder where a console ClickOnce .application (executable file) resides. The folder where it launches from.
...
How can I write text on a HTML5 canvas element?
...
var canvas = document.getElementById("my-canvas");
var context = canvas.getContext("2d");
context.fillStyle = "blue";
context.font = "bold 16px Arial";
context.fillText("Zibri", (canvas.width / 2) - 17, (canvas.height / 2) + 8);
#my-canvas {
backgro...