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How to iterate a loop with index and element in Swift
...ubscript to access the element at the corresponding index:
let list = [100,200,300,400,500]
for index in list.indices {
print("Element at:", index, " Value:", list[index])
}
Using forEach
list.indices.forEach {
print("Element at:", $0, " Value:", list[$0])
}
Using collection enumerated() m...
jQuery SVG, why can't I addClass?
...t_div.className);
console.log(test_svg.className);
#test-div {
width: 200px;
height: 50px;
background: blue;
}
<div class="test div" id="test-div"></div>
<svg width="200" height="50" viewBox="0 0 200 50">
<rect width="200" height="50" fill="green" class="test sv...
How to download a file with Node.js (without using third-party libraries)?
... validate by checking response code. Here it's considered success only for 200 response code, but other codes might be good.
const fs = require('fs');
const http = require('http');
const download = (url, dest, cb) => {
const file = fs.createWriteStream(dest);
const request = http.get(...
Why do some functions have underscores “__” before and after the function name?
...derscore in a name is a bit like choosing between protected and private in C++ and Java? _single_leading_underscore can be changed by children, but __double_leading_underscore can't?
– Alex W
Jun 4 '14 at 21:00
...
Hidden features of mod_rewrite
...
I have seen several modifications to this 200, !=200, ^., ^$. Apparentely the variable gets set to 200 for a redirect, but also other pages (error and stuff) set it to some value. Now that means that you either check if it is empty, is not empty, is 200 or is not 200...
Python: changing value in a tuple
... but if anyone is curious it can be done on one line with:
tuple = tuple([200 if i == 0 else _ for i, _ in enumerate(tuple)])
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Compare JavaScript Array of Objects to Get Min / Max
...w you can just say:
myArray.hasMin('ID') // result: {"ID": 1, "Cost": 200}
myArray.hasMin('Cost') // result: {"ID": 3, "Cost": 50}
myEmptyArray.hasMin('ID') // result: null
Please note that if you intend to use this, it doesn't have full checks for every situation. If you pass in an arr...
Is there a best practice for generating html with javascript
...ncatenate strings, instead of the normal :
var s="";
for (var i=0; i < 200; ++i) {s += "testing"; }
use a temporary array:
var s=[];
for (var i=0; i < 200; ++i) { s.push("testing"); }
s = s.join("");
Using arrays is much faster, especially in IE. I did some testing with strings a while a...
Center a position:fixed element
... (standards mode), this should do:
position: fixed;
width: 500px;
height: 200px;
top: 50%;
left: 50%;
margin-top: -100px; /* Negative half of height. */
margin-left: -250px; /* Negative half of width. */
Or, if you don't care about centering vertically and old browsers such as IE6/7, then you can...
Calling Objective-C method from C++ member function?
I have a class ( EAGLView ) which calls a member function of a C++ class without problems. Now, the problem is that I need to call in that C++ class a objective-C function [context renderbufferStorage:GL_RENDERBUFFER fromDrawable:(CAEAGLLayer*)self.layer]; which I cannot do in C++ syntax...