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Printing a variable memory address in swift
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Swift 2
This is now part of the standard library: unsafeAddressOf.
/// Return an UnsafePointer to the storage used for `object`. There's
/// not much you can do with this other than use it to identify the
/// object
Swift 3
For Swift 3, use withUnsafeP...
What does static_assert do, and what would you use it for?
...n example where static_assert(...) ('C++11') would solve the problem in hand elegantly?
8 Answers
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What does the “assert” keyword do? [duplicate]
...ed, execution of the assertion causes evaluation of the boolean expression and an error is reported if the expression evaluates to false. If the assertion is disabled, execution of the assertion has no effect whatsoever.
Where "enabled or disabled" is controlled with the -ea switch and "An error i...
Tooltips for cells in HTML table (no Javascript)
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You can use css and the :hover pseudo-property. Here is a simple demo. It uses the following css:
a span.tooltip {display:none;}
a:hover span.tooltip {position:absolute;top:30px;left:20px;display:inline;border:2px solid green;}
Note that ...
How to delete multiple files at once in Bash on Linux?
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Bash supports all sorts of wildcards and expansions.
Your exact case would be handled by brace expansion, like so:
$ rm -rf abc.log.2012-03-{14,27,28}
The above would expand to a single command with all three arguments, and be equivalent to typing:
$ rm -rf...
CSS table layout: why does table-row not accept a margin?
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See the CSS 2.1 standard, section 17.5.3. When you use display:table-row, the height of the DIV is solely determined by the height of the table-cell elements in it. Thus, margin, padding, and height on those elements have no effect.
http://ww...
When do we need curly braces around shell variables?
In shell scripts, when do we use {} when expanding variables?
7 Answers
7
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Getting MAC Address
...dress of a computer at run time. For windows the 'wmi' module can be used and the only method under Linux I could find was to run ifconfig and run a regex across its output. I don't like using a package that only works on one OS, and parsing the output of another program doesn't seem very elegant ...
There is no ViewData item of type 'IEnumerable' that has the key 'xxx'
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Ok, so the answer was derived from some other posts about this problem and it is:
If your ViewData contains a SelectList with the same name as your DropDownList i.e. "submarket_0", the Html helper will automatically populate your DropDownList with that data if you don't specify the 2nd paramete...
embedding image in html email
...ttempts have failed, with the image showing up as a red X (in Outlook 2007 and yahoo mail)
14 Answers
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