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Delete/Reset all entries in Core Data?
...
You can still delete the file programmatically, using the NSFileManager:removeItemAtPath:: method.
NSPersistentStore *store = ...;
NSError *error;
NSURL *storeURL = store.URL;
NSPersistentStoreCoordinator *storeCoordinator = ...;
[storeCoordinator r...
ValueError : I/O operation on closed file
...d be inside the with block:
import csv
with open('v.csv', 'w') as csvfile:
cwriter = csv.writer(csvfile, delimiter=' ', quotechar='|', quoting=csv.QUOTE_MINIMAL)
for w, c in p.items():
cwriter.writerow(w + c)
Outside the with block, the file is closed.
>>> with ope...
Remove a git commit which has not been pushed
...when using git reset --hard HEAD^ as you will lose changes in the commited files (you changes will be deleted). There are two branches to this question: To revert a commit but still have changes on disk do so git reset --soft HEAD~1
– papigee
Feb 22 '19 at 18:2...
Can't stop rails server
... If Webrick is running, then its PID is in {APP_ROOT}/tmp/pids/server.pid file so you don't have to look for it -- as long as server is running. So, if instead of doing ctrl-c you just run that kill command in another terminal, it will kill Webrick server immediately.
– Learne...
Get current batchfile directory
...nly variable %CD% keeps the path of the caller of the batch, not the batch file location.
You can get the name of the batch script itself as typed by the user with %0 (e.g. scripts\mybatch.bat). Parameter extensions can be applied to this so %~dp0 will return the Drive and Path to the batch script ...
git add . vs git commit -a
...p; git commit.
It's not the same as git add . as this would add untracked files that aren't being ignored, git add -u only stages changes (including deletions) to already tracked files.
[*] There's a subtle difference if you're not at the root directory of your repository. git add -u stages update...
YouTube iframe API: how do I control an iframe player that's already in the HTML?
...was specified". Why?
A: The API doesn't function properly at a local host (file://). Host your (test) page online, or use JSFiddle. Examples: See the links at the top of this answer.
Q: How did you know this?
A: I have spent some time to manually interpret the API's source. I concluded that I had t...
Resizing SVG in html?
So, I have an SVG file in HTML, and one of the things I've heard about the format is that it doesn't get all pixelated when you zoom in on it.
...
How can I disable a button on a jQuery UI dialog?
...ter solution... either way, here's my 2cents. :)
Just add this to your JS file:
$.fn.dialogButtons = function(name, state){
var buttons = $(this).next('div').find('button');
if(!name)return buttons;
return buttons.each(function(){
var text = $(this).text();
if(text==name && state==...
Is git not case sensitive?
...ve system. If this is the case, ensure you are tab-completing any paths or file names. Further, to change the name of something in just the case, do this:
mv file.txt temp.txt
git add -A
git commit -m "renaming..."
mv temp.txt File.txt
git add -A
git commit --amend -m "Renamed file.txt to File.txt"...