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What's the difference between .bashrc, .bash_profile, and .environment?
...ke every flavor of Bash I use has a different algorithm for deciding which startup scripts to run. For the purposes of tasks like setting up environment variables and aliases and printing startup messages (e.g. MOTDs), which startup script is the appropriate place to do these?
...
What does numpy.random.seed(0) do?
...d(4)
array([ 0.96, 0.38, 0.79, 0.53])
(pseudo-)random numbers work by starting with a number (the seed), multiplying it by a large number, adding an offset, then taking modulo of that sum. The resulting number is then used as the seed to generate the next "random" number. When you set the see...
Read a file in Node.js
...
Use path.join(__dirname, '/start.html');
var fs = require('fs'),
path = require('path'),
filePath = path.join(__dirname, 'start.html');
fs.readFile(filePath, {encoding: 'utf-8'}, function(err,data){
if (!err) {
console.log('r...
How can I select every other line with multiple cursors in Sublime Text?
...the selections, leaving just the cursors: ←
You now have a cursor at the start of every odd-numbered line. If you wanted even-numbered lines, press down: ↓
Depending on the file, there might be one cursor missing right down the bottom of the file. Using the mouse (damn!) scroll to the bottom, ho...
Android error: Failed to install *.apk on device *: timeout
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I changed it to 10000ms. It threw the same error. Restarting the device worked in my case.
– nous
Feb 5 '15 at 21:38
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How do I shuffle an array in Swift?
...ing methods for that version.
Swift 4.2+
shuffle and shuffled are native starting Swift 4.2. Example usage:
let x = [1, 2, 3].shuffled()
// x == [2, 3, 1]
let fiveStrings = stride(from: 0, through: 100, by: 5).map(String.init).shuffled()
// fiveStrings == ["20", "45", "70", "30", ...]
var numbe...
How does the Windows Command Interpreter (CMD.EXE) parse scripts?
...(s) Only if the command block did not begin with @, and ECHO was ON at the start of the preceding step.
Phase 4) FOR %X variable expansion: Only if a FOR command is active and the commands after DO are being processed.
Phase 5) Delayed Expansion: Only if delayed expansion is enabled
Phase 5.3) Pi...
Using HTML5/Canvas/JavaScript to take in-browser screenshots
...egion");
let scr = q(".screen");
let send = q(".send");
let start=0;
let sx,sy,ex,ey=-1;
r.style.width=0;
r.style.height=0;
let drawBox= () => {
r.style.left = (ex > 0 ? sx : sx+ex ) +'px';
r.style.top = (ey > 0 ? sy : sy+ey) ...
How would I run an async Task method synchronously?
....RunSynchronously
.Net 4.0
Use this:
var x = (IAsyncResult)task;
task.Start();
x.AsyncWaitHandle.WaitOne();
...or this:
task.Start();
task.Wait();
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A non well formed numeric value encountered
I have a form that passes two dates (start and finish) to a PHP script that will add those to a DB. I am having problems validating this. I keep getting the following errors
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