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Returning a C string from a function
... in order.
In C (& C++ for that matter), a string is just an array of bytes terminated with a zero byte - hence the term "string-zero" is used to represent this particular flavour of string. There are other kinds of strings, but in C (& C++), this flavour is inherently understood by the lan...
Android - Set max length of logcat messages
By default, it seems that logcat will truncate any log message that it considers to be "too long". This happens both inside of Eclipse and when running logcat on the command line using adb -d logcat , and is truncating some important debugging messages.
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brew install mysql on macOS
I'm trying to setup up MySQL on mac os 10.6 using Homebrew by brew install mysql 5.1.52 .
16 Answers
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Why does this Java code compile?
... because b is an illegal forward reference to b. You can actually fix this by writing int b = this.b + 1, which compiles without complaints.
For local variables, int d = d + 1 is illegal because d is not initialized before use. This is not the case for fields, which are always default-initialized.
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Resolving javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path
...rts.
First you can check if your certificate is already in the truststore by running the following command:
keytool -list -keystore "%JAVA_HOME%/jre/lib/security/cacerts" (you don't need to provide a password)
If your certificate is missing, you can get it by downloading it with your browser and a...
What's wrong with using $_REQUEST[]?
...or a request that has a real effect, you have to check that it's submitted by the POST method. But the way to do that is to check $_SERVER['REQUEST_METHOD'] explicitly, not rely on $_POST being empty for a GET. And anyway if the method is POST, you still might want to take some query parameters out ...
Pinging servers in Python
... in any OS (Unix, Linux, macOS, and Windows)
Python 2 and Python 3
EDITS:
By @radato os.system was replaced by subprocess.call. This avoids shell injection vulnerability in cases where your hostname string might not be validated.
import platform # For getting the operating system name
import su...
How can I delete one element from an array by value
I have an array of elements in Ruby
15 Answers
15
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How efficient can Meteor be while sharing a huge collection among many clients?
...rol using this.userId. The publish
function sends data into the merge box by calling this.added, this.changed and
this.removed. See the
full publish documentation for
more details.
Most publish functions don't have to muck around with the low-level
added, changed and removed API, though. If a pu...
Why does Python code run faster in a function?
... is a CPython implementation detail.
Remember that CPython is compiled to bytecode, which the interpreter runs. When a function is compiled, the local variables are stored in a fixed-size array (not a dict) and variable names are assigned to indexes. This is possible because you can't dynamically a...