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Why does this code segfault on 64-bit architecture but work fine on 32-bit?
I came across the following C puzzle:
3 Answers
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sed: print only matching group
I want to grab the last two numbers (one int, one float; followed by optional whitespace) and print only them.
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How to implement a confirmation (yes/no) DialogPreference?
...at is a simple alert dialog, Federico gave you a site where you can look things up.
Here is a short example of how an alert dialog can be built.
new AlertDialog.Builder(this)
.setTitle("Title")
.setMessage("Do you really want to whatever?")
.setIcon(android.R.drawable.ic_dialog_alert)
.setPositive...
How to assign a Git SHA1's to a file without Git?
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This is how Git calculates the SHA1 for a file (or, in Git terms, a "blob"):
sha1("blob " + filesize + "\0" + data)
So you can easily compute it yourself without having Git installed. Note that "\0" is the NULL-byte, not a two-character string.
For example, the hash of an ...
Copying files using rsync from remote server to local machine
Once I've ssh'd into my remote server, what would the command be to copy all files from a directory to a local directory on my machine?
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What is AF_INET, and why do I need it?
I'm getting started on socket programming, and I keep seeing this AF_INET .
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Why are Docker container images so large?
I made a simple image through Dockerfile from Fedora (initially 320 MB).
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Django's SuspiciousOperation Invalid HTTP_HOST header
After upgrading to Django 1.5, I started getting errors like this:
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Does the JVM prevent tail call optimizations?
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This post: Recursion or Iteration? might help.
In short, tail call optimization is hard to do in the JVM because of the security model and the need to always have a stack trace available. These requirements could in theory be supported, but it would probably require a new...
Check if a value is within a range of numbers
I want to check if a value is in an accepted range. If yes, to do something; otherwise, something else.
7 Answers
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