Opening Generic ASCII Text Files
5.6.0
open my $filehandle, '<', $name_of_file or die "Can't open $name_of_file, $!";
This is the basic idiom for "default" File IO and makes $filehandle a readable input stream of bytes, filtered by a default system-specific decoder, which...
8
The proposed Object.entries() method returns an array of key/value pairs for the given object. It does not return an iterator like Array.prototype.entries(), but the Array returned by Object.entries() can be iterated regardless.
const obj = {
one: 1,
two: 2,
three: 3
};
Object...
If we need to parse a large file, e.g. a CSV more than 10 Mbytes containing millions of rows, some use file or file_get_contents functions and end up with hitting memory_limit setting with
Allowed memory size of XXXXX bytes exhausted
error. Consider the following source (top-1m.csv has exactly...
When rendering a form 'by hand', it can be useful to know if there are fields left to render or not.
The function isRendered() from the FormView class returns true if there are still fields left to be rendered to the template.
This snippet prints <h3>Extra fields</h3> if there are fiel...
Matplotlib includes the image module for image manipulation
import matplotlib.image as mpimg
import matplotlib.pyplot as plt
Images are read from file (.png only) with the imread function:
img = mpimg.imread('my_image.png')
and they are rendered by the imshow function:
plt.imshow(img)
L...
Consider using Extension Methods as Functions which wrap other code, here's a great example that uses both a static method and and extension method to wrap the Try Catch construct. Make your code Bullet Proof...
using System;
using System.Diagnostics;
namespace Samples
{
/// <summary&g...
Many database configurations require authentication (in the form of a username and password) before you can query the database. You can supply these using the username and password attributes.
Note: the username and password can also be configured against the datasource in the ColdFusion Administra...
You can limit the number of rows to be returned by using the maxrows attribute.
<cfquery datasource="Entertainment" maxrows="50">
select *
from Movies
</cfquery>
Structures can be made generic over one or more type parameters. These types are given enclosed in <> when referring to the type:
struct Gen<T> {
x: T,
z: isize,
}
// ...
let _: Gen<bool> = Gen{x: true, z: 1};
let _: Gen<isize> = Gen{x: 42, z: 2};
let _: Gen...
namespace HelloWorld;
interface
type
App = class
public
class method Main(args: array of String);
end;
implementation
class method App.Main(args: array of String);
begin
Console.WriteLine('Hello World');
end;
end.
using System.ComponentModel.DataAnnotations;
public class Post
{
public int Id { get; set; }
[StringLength(100)]
public string Title { get; set;}
[StringLength(300)]
public string Abstract { get; set; }
public string Description { get; set; }
}
Def...
You cam amend the time of a commit using
git commit --amend --date="Thu Jul 28 11:30 2016 -0400"
or even
git commit --amend --date="now"
If you make a commit as the wrong author, you can change it, and then amend
git config user.name "Full Name"
git config user.email "[email protected]"
git commit --amend --reset-author
Android Studio's Live templates can offer quite a few shortcuts for quick logging.
To use Live templates, all you need to do is to start typing the template name, and hit TAB or enter to insert the statement.
Examples:
logi → turns into → android.util.Log.i(TAG, "$METHOD_NAME$: $content$&q...
Caffe can run on multiple cores. One way is to enable multithreading with Caffe to use OpenBLAS instead of the default ATLAS. To do so, you can follow these three steps:
sudo apt-get install -y libopenblas-dev
Before compiling Caffe, edit Makefile.config, replace BLAS := atlas by BLAS := open
A...
It is sometimes required for a process to concurrently write and read the same "data".
The ReadWriteLock interface, and its ReentrantReadWriteLock implementation allows for an access pattern that can be described as follow :
There can be any number of concurrent readers of the data. If...
