detection

问题 What's concept of detecting support of any css pseudo-class in browser through JavaScript? Exactly, I want to check if user's browser supports :checked pseudo-class or not, because I've made some CSS-popups with checkboxes and needs to do fallbacks for old browsers. ANSWER: I'm found already implemented method of testing css selectors in a Modernizr "Additional Tests". 回答1: You can simply check if your style with pseudo-class was applied. Something like this: http://jsfiddle.net/qPmT2/1/ 回答2:

问题 I need to implement a custom logging in my app. To do this i need to detect if the current version of the app has been installed from the app store or is running from xcode or is a TestFlight version. There is something different in the app depending from the installation source? I don't want to have something different in the development environment. 回答1: You can get part of the way there by reading in the embedded.mobileprovision file from the application bundle: NSString *provisionPath = [

问题 just trying to make a simple pong game in p5.js. I have very recently gotten into JavaScript and can't manage to figure out collision detection between the ball and the bat. I have tried a few ways of doing it but it mostly just stopped my code from running.. etc.. would love any help! Here is my source code: function setup() { createCanvas(750, 750); } var x = 50; var y = 50; var direction = 5; var arrow = 0; var ball; var bat; function draw() { background(220); fill ('white'); ball =

问题 Are there any good, open source engines out there for detecting what language a text is in, perhaps with a probability metric? One that I can run locally and doesn't query Google or Bing? I'd like to detect language for each page in about 15 million pages of OCR'ed text. Not all documents will contain languages which use the Latin alphabet. 回答1: Depending on what you're doing, you might want to check out the python Natural Language Processing Toolkit (NLTK), which has some support for

问题 This question already has answers here : How can I find which operating system my Ruby program is running on? (10 answers) Closed 5 years ago . Is there a way to detect the operating system in ruby? I am working on developing a sketchup tool that will need to detect Mac vs. Windows. 回答1: You can use the os gem: gem install os And then require 'os' OS.linux? #=> true or false OS.windows? #=> true or false OS.java? #=> true or false OS.bsd? #=> true or false OS.mac? #=> true or false # and so

问题 This question already has answers here : How can I find which operating system my Ruby program is running on? (10 answers) Closed 5 years ago . Is there a way to detect the operating system in ruby? I am working on developing a sketchup tool that will need to detect Mac vs. Windows. 回答1: You can use the os gem: gem install os And then require 'os' OS.linux? #=> true or false OS.windows? #=> true or false OS.java? #=> true or false OS.bsd? #=> true or false OS.mac? #=> true or false # and so

问题 Hej Guys ! I am trying to run locally the cat example and I got stuck on the trainning step. I get this very long error. Could someone help me out to understand what is wrong ? Thanks in advance. The command: bertalan@mbqs:~/tensorflow/models$ python object_detection/train.py --logtostderr --pipeline_config_path=/home/bertalan/tensorflow/models/object_detection/samples/configs/Myfaster_rcnn_resnet101_pets.config --train_dir=TrainCat Here the output with error: INFO:tensorflow:Scale of 0

问题 I am trying to detect people using a webcam. I have already tried detecting people using a video and it worked. When I change it from video to webcam the detection does not work. What should be done in order to support webcam? def inside(r, q): rx, ry, rw, rh = r qx, qy, qw, qh = q return rx > qx and ry > qy and rx + rw < qx + qw and ry + rh < qy + qh def draw_detections(img, rects, thickness = 1): for x, y, w, h in rects: # the HOG detector returns slightly larger rectangles than the real

问题 I am trying to detect people using a webcam. I have already tried detecting people using a video and it worked. When I change it from video to webcam the detection does not work. What should be done in order to support webcam? def inside(r, q): rx, ry, rw, rh = r qx, qy, qw, qh = q return rx > qx and ry > qy and rx + rw < qx + qw and ry + rh < qy + qh def draw_detections(img, rects, thickness = 1): for x, y, w, h in rects: # the HOG detector returns slightly larger rectangles than the real

问题 How would I use this code: function is_touch_device() { return !!('ontouchstart' in window) // works on most browsers || !!('onmsgesturechange' in window); // works on ie10 }; to detect touch screens and hide a set of divs with the same class. 回答1: You would simply call the function and use basic logic. if (is_touch_device()) { $('.yourclass').hide(); } 回答2: It would be implemented like this: window.onload=function(){ if (is_touch_device()){ var divs=document.getElementsByClassName(