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Resolve promises one after another (i.e. in sequence)?
... Promise.resolve()); // initial
};
In other promise libraries (like when and Bluebird) you have utility methods for this.
For example, Bluebird would be:
var Promise = require("bluebird");
var fs = Promise.promisifyAll(require("fs"));
var readAll = Promise.resolve(files).map(fs.readFileAsync,{c...
If list index exists, do X
In my program, user inputs number n , and then inputs n number of strings, which get stored in a list.
12 Answers
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How many String objects will be created when using a plus sign?
...;
Furthermore, the compiler will remove extraneous constant expressions, and only emit them if they are used or exposed. For instance, this program:
const String one = "1";
const String two = "1";
const String result = one + two + "34";
public static void main(string[] args) {
Console.Out.W...
Set padding for UITextField with UITextBorderStyleNone
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Using ARC, why does my app hang and use a lot of CPU if I reuse *paddingView with multiple text fields?
– The Muffin Man
Nov 27 '13 at 17:03
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Android: Is it possible to display video thumbnails?
...ist of recorded videos where each item consists of icon, video title, tags and location information the following way:
10 A...
How do I convert a numpy array to (and display) an image?
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You could use PIL to create (and display) an image:
from PIL import Image
import numpy as np
w, h = 512, 512
data = np.zeros((h, w, 3), dtype=np.uint8)
data[0:256, 0:256] = [255, 0, 0] # red patch in upper left
img = Image.fromarray(data, 'RGB')
img.sa...
Devise Secret Key was not set
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I ran bundle update this morning and started getting the same error.
I added it as a line in config/initializers/devise.rb and the error was fixed.
This seems to be the commit which introduced it.
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When should I use a table variable vs temporary table in sql server?
...re details in table variable. It says that temp tables are always on disk, and table variables are in memory, that is to say, the performance of table variable is better than temp table because table variable uses less IO operations than temp table.
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Skip download if files exist in wget?
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-nc doesn't prevent the sending of the HTTP request and subsequent downloading of the file. It just doesn't do anything after downloading the file if the file has already been fully retrieved. Is there anyway to prevent making the HTTP request if the file already exists? stack...
NSUserDefaults - How to tell if a key exists
I'm working on a small iPhone app, and I am using NSUserDefaults as my data persistence. It only has to keep track of a few things, such as some names and some numbers so I figure I might as well keep it simple.
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