Thoughts and tips for a daily coding life


Disabling Clang warning

October 05, 2013 Posted by Antanas No comments
If you have a line where you are sure warning is not needed and want to disable it, use this pragma:

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wmultichar"

char b = 'df'; // no warning.

#pragma clang diagnostic pop


Improving cout performance

October 04, 2013 Posted by Antanas , , No comments
If cout performs badly and there are no calls to printf, you can turn off iostream syncing with stdio

Also replace ::endl calls with '\n'. So you are not flushing with every line.
// BAD
std::cout << "This is my line" << std::endl;
std::cout << "This is my line\n";

Adding prettify support to "Dynamic theme" in blogger

October 04, 2013 Posted by Antanas , , No comments
Open theme customization --> Advanced tab --> Add CSS
Paste this CSS if you like it, or customize your own:
/* Curonian pretty-printing styles. Used with prettify.js.  */
pre .str, code .str { color: #DB312F; } /* string literal */
pre .kwd, code .kwd { color: #268AD1; } /* keyword */
pre .com, code .com { color: #B3AE9D; font-style: italic; } /* comment */
pre .typ, code .typ { color: #859900; } /* type */
pre .lit, code .lit { color: #D33682; } /* literal value.  e.g. 1, null, true */
pre .pun, code .pun { color: #647B83; } /* punctuation string */
pre .pln, code .pln { color: #647B83; } /* plain text */
pre .tag, code .tag { color: #FF0000; } /* sgml tag */
pre .dec, code .dec { color: #FF0000; } /* markup declaration such as a DOCTYPE */
pre .atn, code .atn { color: #FF0000; font-weight: normal;} /* sgml attribute name */
pre .atv, code .atv { color: #FF0000; } /* sgml attribute value */
pre .src, code .src { color: #FF0000;} /* embedded source */
pre.prettyprint, code.prettyprint {
  font-family:"Lucida Console", Monaco, monospace;
  font-weight: normal;
  font-size: 8pt;
  background-color: #FDF6E2;
  -moz-border-radius: 2px;
  -webkit-border-radius: 2px;
  -o-border-radius: 2px;
  -ms-border-radius: 2px;
  -khtml-border-radius: 2px;
  border-radius: 2px;
pre.prettyprint {
  width: 95%;
  margin: 5px 0px;
  padding: 2px; border: 1px solid #EDE8D4;;
  white-space: pre-wrap;

/* Specify class=linenums on a pre to get line numbering */
ol.linenums { margin-top: 0; margin-bottom: 0; color: #647B83; } /* IE indents via margin-left */
li.L0,li.L1,li.L2,li.L3,li.L5,li.L6,li.L7,li.L8 { list-style-type: none }
/* Alternate shading for lines */
li.L1,li.L3,li.L5,li.L7,li.L9 { }

@media print {
  pre.prettyprint { background-color: none }
  pre .str, code .str { color: #060 }
  pre .kwd, code .kwd { color: #006; font-weight: bold }
  pre .com, code .com { color: #600; font-style: italic }
  pre .typ, code .typ { color: #404; font-weight: bold }
  pre .lit, code .lit { color: #044 }
  pre .pun, code .pun { color: #440 }
  pre .pln, code .pln { color: #000 }
  pre .tag, code .tag { color: #006; font-weight: bold }
  pre .atn, code .atn { color: #404 }
  pre .atv, code .atv { color: #060 }

Now go back to blogger and switch to edit HTML. At the end of head tag add these lines
<!-- Pretty print support start -->
<link href="" rel="stylesheet" type="text/css"/>
<script src="" type="text/javascript" />
<script language="javascript" type="text/javascript">
    $(window.blogger.ui()).on('viewitem', function (event, post, element) {
<!-- Pretty print support end -->
Save & close your template.

Now when you want to include source code in your post - put it inside pre tags. Like this:
<pre class="prettyprint">
    * Put your code here
You can find more information on usage over at prettify project website here:

Also thank you to Jeffery To over at stackoverflow for JS function which makes it all work nicely inside blogger.

.gitignore file for Xcode 4/5

October 04, 2013 Posted by Antanas , No comments
Original post on stackoverflow:

My own forked gist (updated for Xcode 5):

-- Update --
Here's quick Terminal command to downloading this:
curl -o .gitignore
git add .gitignore
git commit -m "Adding gitignore file"
git push -u origin master

Accessibility checklist

October 04, 2013 Posted by Antanas , No comments
Quick checklist for accessibility proofing.

  • Make sure app can be resized to as small size as possible
  • Might be used on resolutions down to 800x600
  • Make one "bottle neck" method for setting font size inside application (suggested limits 8-40pt)
  • Use application in greyscale mode
  • Make sure every UI element has description for screen readers. (Make sure description strings are localized)
  • Make sure no element depends on just visual information (color/shape)