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Ruby on Rails: Where to define global constants?
I'm just getting started with my first Ruby on Rails webapp. I've got a bunch of different models, views, controllers, and so on.
...
Why does changing the returned variable in a finally block not change the return value?
...rn statement counts as an abrupt termination of the try block (the section starting "If execution of the try block completes abruptly for any other reason R...." applies). See Section 14.17 of the JLS for why a return statement is an abrupt termination of a block.
By way of further detail: if both t...
What is copy-on-write?
...ck of data called A. Process 1, 2, 3, 4 each want to make a copy of it and start reading it, in a "Copy on write" system nothing is copied yet everything is still reading A. Now process 3 wants to make a change to it's copy of A, process 3 will now actually make a copy of A and create a new block of...
.keyCode vs. .which
...nk is only provided by jQuery but I'm not 100% sure, but it should get you started on seeing differences in browsers)
– Mottie
Dec 17 '10 at 15:05
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How do I check out a remote Git branch?
...checkout -t <name of remote>/test
With >1 Remotes
Before you can start working locally on a remote branch, you need to fetch it as called out in answers below.
To fetch a branch, you simply need to:
git fetch origin
This will fetch all of the remote branches for you. You can see the branc...
Rollback to an old Git commit in a public repo
...D~20..
The commit range HEAD~20.. is short for HEAD~20..HEAD, and means "start from the 20th parent of the HEAD commit, and revert all commits after it up to HEAD".
That will revert that last 20 commits, assuming that none of those are merge
commits. If there are merge commits, then you cannot r...
UnicodeDecodeError: 'ascii' codec can't decode byte 0xef in position 1
...
Try setting the system default encoding as utf-8 at the start of the script, so that all strings are encoded using that.
# coding: utf-8
import sys
reload(sys)
sys.setdefaultencoding('utf-8')
share
...
“CAUTION: provisional headers are shown” in Chrome debugger
...ns of chrome
Type chrome://net-export/ in the address bar and hit enter.
Start Recording. And save Recording file to local.
Open the page that is showing problems.
Go back to net-internals
You can view Recorded Log file Here https://netlog-viewer.appspot.com/#import
click on events (###) and use t...
How can I pad a value with leading zeros?
...n!
Potentially outdated: ECMAScript 2017 includes String.prototype.padStart and Number.prototype.toLocaleString is there since ECMAScript 3.1. Example:
var n=-0.1;
n.toLocaleString('en', {minimumIntegerDigits:4,minimumFractionDigits:2,useGrouping:false})
...will output "-0000.10".
// or...
How do I copy SQL Azure database to my local development server?
...
The trick for me was to start replicating PKs/FKs/constraints on empty DB, then temporarily disable constraints while importing data. More precisely: 1-Create empty target DB manually. 2-Right-click source DB > Tasks > Generate Scripts. 3-R...