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How to automatically generate a stacktrace when my program crashes
...tput, which glibc can use to make a nice stacktrace:
$ gcc -g -rdynamic ./test.c -o test
Executing this gets you this output:
$ ./test
Error: signal 11:
./test(handler+0x19)[0x400911]
/lib64/tls/libc.so.6[0x3a9b92e380]
./test(baz+0x14)[0x400962]
./test(bar+0xe)[0x400983]
./test(foo+0xe)[0x400993...
How to resolve “must be an instance of string, string given” prior to PHP 7?
...lass or interface boolean, rather than of type bool:
<?php
function test(boolean $param) {}
test(true);
?>
The above example will output:
Fatal error: Uncaught TypeError: Argument 1 passed to test() must be an instance of boolean, boolean given, called in - on line 1 and define...
How to test valid UUID/GUID?
...9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$/.test('01234567-9ABC-DEF0-1234-56789ABCDEF0');
or with brackets
/^\{?[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}\}?$/
...
Does PowerShell support constants?
...
Use
Set-Variable test -option Constant -value 100
or
Set-Variable test -option ReadOnly -value 100
The difference between "Constant" and "ReadOnly" is that a read-only variable can be removed (and then re-created) via
Remove-Variable te...
C++ project organisation (with gtest, cmake and doxygen)
...stall on their
platform. CMake comes with a find_package script for Google
Test. This makes things a lot easier. I would go with bundling only
when necessary and avoid it otherwise.
How to build: Avoid in-source builds. CMake makes out of source-builds
easy and it makes life a lot easier.
I suppos...
Different names of JSON property during serialization and deserialization
...
Just tested and this works:
public class Coordinates {
byte red;
@JsonProperty("r")
public byte getR() {
return red;
}
@JsonProperty("red")
public void setRed(byte red) {
this.red = red;
...
CSS text-overflow: ellipsis; not working?
...e: nowrap;
color: #000;
}
<div class="app">
<a href="">Test Test Test Test Test Test</a>
</div>
Useful references:
https://developer.mozilla.org/en-US/docs/Web/CSS/text-overflow
https://developer.mozilla.org/en-US/docs/Web/CSS/white-space
...
Extract hostname name from string
...(url)); // returns youtube.com
I can't use an npm package, so below only tests extractHostname.
function extractHostname(url) {
var hostname;
//find & remove protocol (http, ftp, etc.) and get hostname
if (url.indexOf("//") > -1) {
hostname = url.split('/')[2]...
How can I get a list of locally installed Python modules?
...
Steps to reproduce:
Create a virtual environment
$ cd /tmp
$ virtualenv test_env
New python executable in test_env/bin/python
Installing setuptools, pip...done.
$ source test_env/bin/activate
(test_env) $
Clone a git repo with setup.py
(test_env) $ git clone https://github.com/behave/behave.g...
Sockets: Discover port availability using Java
...
This doesn't test whether at port is available. It tests whether it is in LISTEN state, whether the IP address is reachable, etc.
– Marquis of Lorne
Jul 27 '15 at 22:55
...