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When to use Storyboard and when to use XIBs
... need XIBs: In both of my Storyboard projects I had to use XIBs for custom table cells.
I think Storyboards are a step in the right direction for UI implementation and hope Apple will extend them in future iOS versions. They need to resolve the "single file" issue though, otherwise they won't be a...
Active Record - Find records which were created_at before today
...ys.ago)
Using the underlying Arel interface:
MyModel.where(MyModel.arel_table[:created_at].lt(2.days.ago))
Using a thin layer over Arel:
MyModel.where(MyModel[:created_at] < 2.days.ago)
Using squeel:
MyModel.where { created_at < 2.days.ago }
...
Check if an element is a child of a parent
... is not within child';
}
<div id="parent">
<div>
<table>
<tr>
<td><span id="child"></span></td>
</tr>
</table>
</div>
</div>
<div id="result"></div>
...
Using :after to clear floating elements
...s well:
.clearfix:before,
.clearfix:after {
content: "";
display: table;
}
.clearfix:after {
clear: both;
}
/* IE 6 & 7 */
.clearfix {
zoom: 1;
}
Give the class clearfix to the parent element, for example your ul element.
Sources here and here.
...
Assembly code vs Machine code vs Object code?
... machine code file in a text editor you would see garbage, including unprintable characters (no, not those unprintable characters ;) ).
Object code is a portion of machine code not yet linked into a complete program. It's the machine code for one particular library or module that will make up the co...
Generating CSV file for Excel, how to have a newline inside a value
...l;}
-->
</style>
</head>
<body>
<table>
<tr>
<td>first line<br/>second line</td>
<td style="white-space:normal">first line<br/>second line</td>
</tr>
</table>
</bod...
What is the difference between Trap and Interrupt?
..., I/O ports, etc). These are asynchronous (i.e. they don't happen at predictable places in the user code) or "passive" since the interrupt handler has to wait for them to happen eventually.
You can also see a trap as a kind of CPU-internal interrupt since the handler for trap handler looks like an ...
Returning IEnumerable vs. IQueryable
... approximately takes 90 seconds to run that block of code against a WebLog table which has 1 million records.
So, all table records are loaded into memory as objects, and then with each .Where() it will be another filter in memory against these objects.
When we use IQueryable instead of IEnumerabl...
Setting up connection string in ASP.NET to SQL SERVER
...tabase using the details verified above in the con string wizzard. Add any table and save the file.
Now go into the web config, and magically, you will see nice clean working connection string there with all the details you need.
{ Below was part of an old post so you can ignore this, I leave i...
What is an AngularJS directive?
...e things like <a href="...">, <img src="...">, <br>, <table><tr><th>. How would you describe what a, href, img, src, br, table, tr, and th are? That's what a directive is.
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