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Fix warning “Capturing [an object] strongly in this block is likely to lead to a retain cycle” in AR
...sponseData error:nil];
// ...
}];
If you want to also target iOS 4, use __unsafe_unretained instead of __weak. Same behavior, but the pointer stays dangling instead of being automatically set to nil when the object is destroyed.
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Using the HTML5 “required” attribute for a group of checkboxes?
When using the newer browsers that support HTML5 (FireFox 4 for example);
and a form field has the attribute required='required' ;
and the form field is empty/blank;
and the submit button is clicked;
the browsers detects that the "required" field is empty and does not submit the form; ins...
Vertically centering Bootstrap modal window
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This does the job : http://jsfiddle.net/sRmLV/1140/
It uses a helper-div and some custom css. No javascript or jQuery required.
HTML (based on Bootstrap's demo-code)
<button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">Launch demo moda...
How to install PyQt4 on Windows using pip?
I'm using Python 3.4 on Windows. When I run a script, it complains
13 Answers
13
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Any reason to clean up unused imports in Java, other than reducing clutter?
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Lakshya Goyal
34011 gold badge55 silver badges2323 bronze badges
answered Jun 11 '09 at 2:48
JanuszJanusz
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How would Git handle a SHA-1 collision on a blob?
...0 (Debian version). I basically just reduced the hash size from 160-bit to 4-bit by applying the following diff and rebuilding git:
--- git-2.7.0~rc0+next.20151210.orig/block-sha1/sha1.c
+++ git-2.7.0~rc0+next.20151210/block-sha1/sha1.c
@@ -246,6 +246,8 @@ void blk_SHA1_Final(unsigned char hashou
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How to check if a string is a valid JSON string in JavaScript without using Try/Catch
...nd it will work in most cases, not all cases.
Have a look around the line 450 in https://github.com/douglascrockford/JSON-js/blob/master/json2.js
There is a regexp that check for a valid JSON, something like:
if (/^[\],:{}\s]*$/.test(text.replace(/\\["\\\/bfnrtu]/g, '@').
replace(/"[^"\\\n\r]*"|t...
How can I select all children of an element except the last child?
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edited Jan 11 '17 at 21:43
TylerH
18.1k1212 gold badges6161 silver badges8080 bronze badges
answered A...
How to check Django version
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answered Jun 24 '11 at 13:30
bcoughlanbcoughlan
22.5k1616 gold badges7979 silver badges130130 bronze badges
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