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PostgreSQL Connection URL
...rmed as follows:
postgresql://[user[:password]@][netloc][:port][/dbname][?param1=value1&...]
Here are examples from same document
postgresql://
postgresql://localhost
postgresql://localhost:5432
postgresql://localhost/mydb
postgresql://user@localhost
postgresql://user:secret@localhost
postgr...
How to normalize a path in PowerShell?
...
The parameters for [io.path]::Combine are reversed. Better yet, use the native Join-Path PowerShell command: Join-Path (Resolve-Path ..\frag).Path 'fred\frog' Also note that, at least as of PowerShell v3, Resolve-Path now support...
Single vs Double quotes (' vs ")
...as JavaScript within an attribute, for example:
<button onClick='func("param");'>Press Me</button>
Of course if we are in PHP and want the parser to handle PHP variables within the string we should intentionally use double quotes. $a='Awesome'; $b = "Not $a";
Sources
Single quotes vs...
How to load a tsv file into a Pandas DataFrame?
...stead, i used read_table(), which worked much faster and without the extra param.
– Yurik
Aug 15 '14 at 9:56
...
Check number of arguments passed to a Bash script
...between its arguments.
if [ "$#" -ne 1 ]; then
echo "Illegal number of parameters"
fi
Or
if test "$#" -ne 1; then
echo "Illegal number of parameters"
fi
Suggestions
When in Bash, prefer using [[ ]] instead as it doesn't do word splitting and pathname expansion to its variables that quoting...
Adding a directory to the PATH environment variable in Windows
...function. Just supply the directory you wish to add:
function AddTo-Path{
param(
[string]$Dir
)
if( !(Test-Path $Dir) ){
Write-warning "Supplied directory was not found!"
return
}
$PATH = [Environment]::GetEnvironmentVariable("PATH")
if( $PATH -notlike "*"+$Dir+...
Calling constructor from other constructor in same class
...
Append :this(required params) at the end of the constructor to do 'constructor chaining'
public Test( bool a, int b, string c )
: this( a, b )
{
this.m_C = c;
}
public Test( bool a, int b, float d )
: this( a, b )
{
this.m_D = d;
...
Using PowerShell to write a file in UTF-8 without the BOM
... strings.
However, it is not a complete implementation of all Out-String parameters:
* Only a literal output path is supported, and only as a parameter.
* -Force is not supported.
Caveat: *All* pipeline input is buffered before writing output starts,
but the string representations...
How to create .pfx file from certificate and private key?
...ot CA and intermediate certs, then include them as well using multiple -in params
openssl pkcs12 -export -out domain.name.pfx -inkey domain.name.key -in domain.name.crt -in intermediate.crt -in rootca.crt
You can install openssl from here: openssl
...
Programmatically find the number of cores on a machine
...ode
#ifdef _WIN32
#include <windows.h>
#elif MACOS
#include <sys/param.h>
#include <sys/sysctl.h>
#else
#include <unistd.h>
#endif
int getNumCores() {
#ifdef WIN32
SYSTEM_INFO sysinfo;
GetSystemInfo(&sysinfo);
return sysinfo.dwNumberOfProcessors;
#elif MACOS...