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Rails: call another controller action from a controller
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To use one controller from another, do this:
def action_that_calls_one_from_another_controller
controller_you_want = ControllerYouWant.new
controller_you_want.request = request
controller_you_want.response = response
contro...
Move an array element from one array position to another
...t; arr.length, it will probably appear in the right place, unless they've done something strange like pass in a negative number.
A fancier version to account for negative indices:
function array_move(arr, old_index, new_index) {
while (old_index < 0) {
old_index += arr.leng...
What is the difference between Normalize.css and Reset CSS?
...mpose a visual starting point (homogeny) upon you. This may not be to everyone's taste. The best thing to do is experiment with both and see which gels with your preferences.
Normalize.css corrects some common bugs that are out of scope for reset.css. It has a wider scope than reset.css, and also pr...
How to sleep for five seconds in a batch file/cmd [duplicate]
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One hack is to (mis)use the ping command:
ping 127.0.0.1 -n 6 > nul
Explanation:
ping is a system utility that sends ping requests. ping is available on all versions of Windows.
127.0.0.1 is the IP address of localhos...
MySQL Cannot Add Foreign Key Constraint
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Was caused by a different collation on the tables for me, one was UTF-8 and the other was latin1.
– ug_
Jul 23 '15 at 22:01
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Differences between INDEX, PRIMARY, UNIQUE, FULLTEXT in MySQL?
...QUE index, except that it is always named 'PRIMARY', and there may be only one on a table (and there should always be one; though some database systems don't enforce this). A PRIMARY index is intended as a primary means to uniquely identify any row in the table, so unlike UNIQUE it should not be us...
How would Git handle a SHA-1 collision on a blob?
...: say you have a git repository, make a commit, and get very very unlucky: one of the blobs ends up having the same SHA-1 as another that is already in your repository. Question is, how would Git handle this? Simply fail? Find a way to link the two blobs and check which one is needed according to th...
Rolling or sliding window iterator?
... the window length is 1. I'm currently using the following code. Does anyone have a more Pythonic, less verbose, or more efficient method for doing this?
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What is Node.js? [closed]
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I use Node.js at work, and find it to be very powerful. Forced to choose one word to describe Node.js, I'd say "interesting" (which is not a purely positive adjective). The community is vibrant and growing. JavaScript, despite its oddities can be a great language to code in. And you will daily ret...
Can I concatenate multiple MySQL rows into one field?
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My need was to get ALL the data from one column. Don't use the GROUP BY clause to do this. Example : SELECT GROUP_CONCAT(emails SEPARATOR ', ') FROM users;
– Jonathan Bergeron
Jan 17 '14 at 14:04
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