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Weak and strong property setter attributes in Objective-C
...for you.
The only time you would want to use weak, is if you wanted to avoid retain cycles (e.g. the parent retains the child and the child retains the parent so neither is ever released).
The 'toll free bridging' part (casting from NS to CF) is a little tricky. You still have to manually manage ...
How can I split up a Git commit buried in history?
...
There is a guide to splitting commits in the rebase manpage. The quick summary is:
Perform an interactive rebase including the target commit (e.g. git rebase -i <commit-to-split>^ branch) and mark it to be edited.
When the rebase ...
Using @include vs @extend in Sass?
...ey, $active-color: white)
background-color: $main-color
border: 1px solid black
border-radius: 0.2em
&:hover, &:active
background-color: $active-color
a
+button
button
+button(pink, red)
Results in:
a {
background-color: lightgrey;
border: 1px solid black;
border...
vs
...l intention in C++98 was that you should use <cstdint> in C++, to avoid polluting the global namespace (well, not <cstdint> in particular, that's only added in C++11, but the <c*> headers in general).
However, implementations persisted in putting the symbols into the global namesp...
How do HTML parses work if they're not using regexp?
... Iterating it yourself with lots of custom logic isn't such a great idea. Use a library that supports the standard algorithm if you can. e.g. search.cpan.org/~tobyink/HTML-HTML5-Parser-0.03/lib/HTML/HTML5/… / code.google.com/p/html5lib
– Quentin
Mar 8 ...
Is gcc 4.8 or earlier buggy about regular expressions?
...eatures long before C++11 was finished and before many other compilers provided any support, and that feedback really helped improve C++11. This was a Good ThingTM.
The <regex> code was never in a useful state, but was added as a work-in-progress like many other bits of code at the time. It w...
Why does the MongoDB Java driver use a random number generator in a conditional?
... "double negative" by reversing the inequality sign.
Coding style issues aside, stochastic logging is quite a dubious practice all by itself, especially since the log entry does not document its own peculiar behavior. The intention is, obviously, reducing restatements of the same fact: that the serv...
Is unsigned integer subtraction defined behavior?
...as if this design choice meant that programmers don't have to carefully avoid over- and under-flow or have their programs fail spectacularly.
– Theodore Murdock
May 26 '17 at 20:17
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What is the difference between YAML and JSON?
What are the differences between YAML and JSON, specifically considering the following things?
13 Answers
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Multiple file upload in php
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HTML
create div with id='dvFile';
create a button;
onclick of that button calling function add_more()
JavaScript
function add_more() {
var txt = "<br><input type=\"file\" name=\"item_file[]\">";
document.getElementById("dvFil...