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How to do something to each file in a directory with a batch script
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Another way:
for %f in (*.mp4) do call ffmpeg -i "%~f" -vcodec copy -acodec copy "%~nf.avi"
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Reduce, fold or scan (Left/Right)?
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In general, all 6 fold functions apply a binary operator to each element of a collection. The result of each step is passed on to the next step (as input to one of the binary operator's two arguments). This way we can cumulate a result.
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Why do people hate SQL cursors so much? [closed]
...lots and lots of cursors. Defeating an RDBMS optimization. And running really slowly.
Simple SQL rewrites to replace nested cursor loops with joins and a single, flat cursor loop can make programs run in 100th the time. [They thought I was the god of optimization. All I did was replace nested l...
What is the significance of ProjectTypeGuids tag in the visual studio project file
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Do you really need a new project type if it is a project with .xaml and .cs files? If you do, I think you'll have to use a different Guid.
– Julien Hoarau
May 26 '10 at 11:33
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How do you add swap to an EC2 instance?
...ning an ec2 micro instance and i've been finding that the instance occasionally runs out of memory.
10 Answers
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How to check if a file is empty in Bash?
I have a file called diff.txt. Want to check if it is empty. Did something like this but couldn't get it working.
10 Answe...
Format string, integer with leading zeros
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Use the format string "img_%03d.jpg" to get decimal numbers with three digits and leading zeros.
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How to search all loaded scripts in Chrome Developer Tools?
In Firebug, you can search some text and it will look for it in all scripts loaded on a page. Can the same be done in Chrome Developer tools while debugging client script? I tried it, but it seems to search only in the script I have open, and not the rest that are on the page.
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“java.lang.OutOfMemoryError : unable to create new native Thread”
...ing out of native threads, i.e. how many threads the operating system will allow your JVM to use.
This is an uncommon problem, because you rarely need that many. Do you have a lot of unconditional thread spawning where the threads should but doesn't finish?
You might consider rewriting into...
Handle ModelState Validation in ASP.NET Web API
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services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2).ConfigureApiBehaviorOptions(options =>
{
options.InvalidModelStateResponseFactory = (context) =>
{
var errors = context.ModelState.Values.SelectMany(...