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Specifying rails version to use when creating a new application
... that having Rails 3 installed fails for 2.3.5 -- Just tested on Mac OS X Snow Leopard with these modules installed:rails (3.0.5, 2.3.5, 2.2.2, 1.2.6)
– Mike
May 2 '11 at 19:41
13
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Convert array to JSON
...] which holds a few integers.
I've added a few values to the array, but I now need to send this array to a page via jQuery's .get method. How can I convert it to a JSON object for sending?
...
What are bitwise shift (bit-shift) operators and how do they work?
..., you would use the following math:
memoryOffset = (row * 320) + column
Now, back in that day and age, speed was critical, so we would use bitshifts to do this operation.
However, 320 is not a power of two, so to get around this we have to find out what is a power of two that added together make...
How to reposition Chrome Developer Tools
...
Cool, dock to right works. Now how do I move the CSS inspector on the Elements tab to the bottom of the dev tools pane? Otherwise I have to view the HTML and the CSS side-by-side in very narrow columns.
– Vicky Chijwani
...
Mercurial move changes to a new branch
...eans, revision 0 is the base on which you started to work on your feature. Now you want to have revisions 1-2 on a named branch, let's say my-feature. Update to revision 0 and create that branch:
$ hg up 0
$ hg branch my-feature
$ hg ci -m "start new branch my-feature"
The history now looks like ...
python date of the previous month
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you could use .replace() method: datetime.utcnow().replace(day=1) - timedelta(days=1)
– jfs
Mar 16 '12 at 6:43
1
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tmux set -g mouse-mode on doesn't work
...tober 2015)
From the changelog:
Mouse-mode has been rewritten. There's now no longer options for:
- mouse-resize-pane
- mouse-select-pane
- mouse-select-window
- mode-mouse
Instead there is just one option: 'mouse' which turns on mouse support
So this is what I'm using now ...
Why does setTimeout() “break” for large millisecond delay values?
...
You can use:
function runAtDate(date, func) {
var now = (new Date()).getTime();
var then = date.getTime();
var diff = Math.max((then - now), 0);
if (diff > 0x7FFFFFFF) //setTimeout limit is MAX_INT32=(2^31-1)
setTimeout(function() {runAtDate(date, func...
How to write LaTeX in IPython Notebook?
...doing, found a better solution with some more searching, IPython notebooks now have a %%latex magic that makes the whole cell Latex without the $$ wrapper for each line.
Refer notebook tour for Rich Display System
share
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Bash continuation lines
... Thanks for your help, but while this does remove the spaces, they are now separate parameters (Bash is interpreting the spaces on the second line as a parameter separator) and are now only printed correctly because of the echo command.
– user880248
Sep 6 '...