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How to avoid “ConcurrentModificationException” while removing elements from `ArrayList` while iterat
...I wanted to remove something other than the current iteration (say it's on index 2, but I need to remove index 7 at the same time). It gives me a ConcurrentModificationException whenever I try through .remove(index).
– user1433479
Jan 12 '15 at 21:40
...
Not equal != operator on NULL
... +1 ... not soon enough. Now when can I get "duplicate" NULLs in an index? :(
– user166390
Apr 14 '11 at 5:19
Y...
Stretch and scale a CSS image in the background - with CSS only
... height: 100%;
position: fixed;
left: 0px;
top: 0px;
z-index: -1; /* Ensure div tag stays behind content; -999 might work, too. */
}
.stretch {
width:100%;
height:100%;
}
That produces the desired effect: only the content will scroll, not the background.
The backgroun...
URLWithString: returns nil
...* stringURL = [NSString stringWithFormat:@"http://maps.google.com/maps/geo?q=%@,Montréal,Communauté-Urbaine-de-Montréal,Québec,Canadae&output=csv&oe=utf8&sensor=false", webName];
NSString* webStringURL = [stringURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSUR...
Is there a bash command which counts files?
...
This simple one-liner should work in any shell, not just bash:
ls -1q log* | wc -l
ls -1q will give you one line per file, even if they contain whitespace or special characters such as newlines.
The output is piped to wc -l, which counts the number of lines.
...
MySQL select 10 random rows from 600K rows fast
...s 0.35s on my machine.
This is fast because the sort phase only uses the indexed ID column. You can see this behaviour in the explain:
SELECT * FROM tbl ORDER BY RAND() LIMIT 10:
SELECT * FROM tbl AS t1 JOIN (SELECT id FROM tbl ORDER BY RAND() LIMIT 10) as t2 ON t1.id=t2.id
Weighted Version: ...
Rebase array keys after unsetting elements
...e but you can't use it inside a for/foreach loop because it rearranges the index every time you call it, so the index of the foreach loop doesn't point to the next element but to the element with that position on the rearranged array. You can see in you example you are deleting the value '3' and lea...
Format a Go string without printing?
... edited Feb 21 '19 at 12:07
ndequeker
6,92366 gold badges5353 silver badges8585 bronze badges
answered Jun 20 '12 at 16:43
...
Flask raises TemplateNotFound error even though template file exists
...ems like my local flask (on Windows) can find templates inside ./Templates/index.html, but when I deploy to heroku (thought it was same Python, same library versions, including same Flask version; but heroku is Unix); and throws TemplateNotFound error; after I renamed the folder git mv Templates/ind...
Remove sensitive files and their commits from Git history
...double quotes (") instead of singles in this command
git filter-branch --index-filter \
'git update-index --remove PATH-TO-YOUR-FILE-WITH-SENSITIVE-DATA' <introduction-revision-sha1>..HEAD
git push --force --verbose --dry-run
git push --force
Update 2019:
This is the current code from the...