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How to concatenate two MP4 files using FFmpeg?
...pe f is for only listing files. I added | sort to sort the files alphabetically; because find reads them in order as saved on filesystem. Works also for files with whitespaces.
– erik
Dec 2 '16 at 14:15
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Python None comparison: should I use “is” or ==?
...ject None, so when you do my_var is None, you're checking whether they actually are the same object (not just equivalent objects)
In other words, == is a check for equivalence (which is defined from object to object) whereas is checks for object identity:
lst = [1,2,3]
lst == lst[:] # This is Tr...
Avoid browser popup blockers
...m javascript that is not invoked by direct user action. That is, you can call window.open in response to a button click without getting hit by the popup blocker, but if you put the same code in a timer event it will be blocked. Depth of call chain is also a factor - some older browsers only look a...
When to use Storyboard and when to use XIBs
... segues. It's much easier to do such a change in code.
Storyboards add two extra liabilities to your project: (1) The Storyboard Editor tool that generates the storyboard XML and (2) the runtime component that parses the XML and creates UI and controller objects from it. Both parts can have bugs tha...
How to specify an area name in an action link?
...a to an action not in an area, you still need to specify the Area as empty string.
For instance, I moved some MVC code into an area, and found I needed to update urls in the master page that referenced other pages on the site.
To specify an url to something not in an area, use
Html.ActionLink("ho...
Why is TypedReference behind the scenes? It's so fast and safe… almost magical!
...ecification, the constructs used to implement them under the hood (vararg calling convention, TypedReference type, arglist, refanytype, mkanyref, and refanyval instructions) are perfectly documented in the CLI Specification (ECMA-335) in the Vararg library.
Being defined in the Vararg Library makes ...
How to check size of a file using Bash?
...
[ -n file.txt ] doesn't check its size, it checks that the string file.txt is non-zero length, so it will always succeed.
If you want to say "size is non-zero", you need [ -s file.txt ].
To get a file's size, you can use wc -c to get the size (file length) in bytes:
file=file.txt
...
(HTML) Download a PDF file instead of opening them in browser when clicked
... Sometimes the question is wrong. ;) Anyways, regarding your issue, that's all a UX problem. Forcing the web to behave in specific ways is sometimes necessary, but often there's better solutions from a UX perspective. Also, my answer is correct. You can not do what you want to do with HTML (which is...
Git cherry pick vs rebase
... the distinction indeed became somewhat moot, but this is something to be called convergent evolution ;-)
The true distinction lies in original intent to create both tools:
git rebase's task is to forward-port a series of changes a developer has in their private repository, created against versio...
Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php
...gram in PHP in a way that consumes memory faster than you realise. Copying strings, arrays and objects instead of using references will do it, though PHP 5 is supposed to do this more automatically than in PHP 4. But dealing with your data set in entirety over several steps is also wasteful compared...