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Why are Where and Select outperforming just Select?
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Select iterates once over the entire set and, for each item, performs a conditional branch (checking for validity) and a + operation.
Where+Select creates an iterator that skips invalid elements (doesn't yield them), performing a + only on the valid items.
So, the cost for a Select i...
How to change the port of Tomcat from 8080 to 80?
I want to execute my web app as http://localhost .
14 Answers
14
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Creating anonymous objects in php
As we know, creating anonymous objects in JavaScript is easy, like the code below:
12 Answers
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How to open, read, and write from serial port in C?
I am a little bit confused about reading and writing to a serial port. I have a USB device in Linux that uses the FTDI USB serial device converter driver. When I plug it in, it creates: /dev/ttyUSB1.
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More elegant “ps aux | grep -v grep”
When I check list of processes and 'grep' out those that are interesting for me, the grep itself is also included in the results. For example, to list terminals:
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Mercurial .hgignore for Visual Studio 2010 projects
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
How to install GCC piece by piece with GMP, MPFR, MPC, ELF, without shared libraries?
...ries, Simply:
Download your GCC-X.0.0 -version (with latest version from: https://gcc.gnu.org/)
Extract the gcc-X-000.tar.gz files to a location /somepath/.
Once you have Extracted .tar.gz file, run ./contrib/download_prerequisites script which is located on /somepath/ or the source directory.
T...
Convert HH:MM:SS string to seconds only in javascript
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Try this:
var hms = '02:04:33'; // your input string
var a = hms.split(':'); // split it at the colons
// minutes are worth 60 seconds. Hours are worth 60 minutes.
var seconds = (+a[0]) * 60 * 60 + (+a[1]) * 60 + (+a[2]);
console.log(seconds);
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Android: Coloring part of a string using TextView.setText()?
... text of a TextView view via the .setText("") method while also coloring a part of the text (or making it bold, italic, transparent, etc.)and not the rest. For example:
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How to save and load cookies using Python + Selenium WebDriver
...ons)
chrome_options.add_argument("user-data-dir=chrome-data")
driver.get('https://www.somedomainthatrequireslogin.com')
time.sleep(30) # Time to enter credentials
driver.quit()
$ cat work.py
#!/usr/bin/python3
import time
from selenium import webdriver
from selenium.webdriver.chrome.options imp...