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function findColor(canvas, targetColor) { | |
const ctx = canvas.getContext("2d"); | |
const width = canvas.width; | |
const height = canvas.height; | |
const imageData = ctx.getImageData(0, 0, width, height); | |
const data = imageData.data; | |
const [r, g, b, a] = targetColor; | |
for (let y = 0; y < height; y++) { | |
for (let x = 0; x < width; x++) { |
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if (Meteor.isServer) { | |
// Get connection object. | |
var connection = Meteor.server; | |
// Get connection constructor. | |
var Connection = connection.constructor; | |
// Get the original "apply" method. | |
var originalMethod = Connection.prototype.apply; | |
// Override the "apply" method. | |
Connection.prototype.apply = function(name, args, options, callback) { | |
if (!callback && typeof options === 'function') { |
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defineRelation(Posts, Users, 'author', 'userId'); | |
Template.Users.helpers({ | |
posts: function() { | |
return Posts.find({}, { | |
sort: { | |
'author.name': 1 | |
} | |
}); | |
} |
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var defineRelation = function( | |
Collection, RelatedCollection, relationName, relatedFieldName | |
) { | |
Collection._computations = Collection._computations || {}; | |
var comps = Collection._computations[relationName] = {}; | |
var stop = function(doc) { | |
if (comps[doc._id]) { | |
comps[doc._id].stop(); | |
} |
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Template.Users.helpers({ | |
// Fetch posts and corresponding authors | |
var posts = Posts.find().fetch(); | |
posts.forEach(function(post) { | |
post.author = Users.findOne(post.userId); | |
}); | |
// Sort posts by a give field | |
posts.sort(function(a, b) { | |
if (a.get('author.name') < b.get('author.name')) { |
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Template.Users.helpers({ | |
posts: function() { | |
return Posts.find({}, { | |
sort: { | |
'author.name': 1 | |
} | |
}); | |
} | |
}); |
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User = Astro.Class({ | |
name: 'User', | |
fields: { | |
name: 'string' | |
} | |
}); | |
Posts = new Mongo.Collection('posts'); | |
Post = Astro.Class({ |
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Users = new Mongo.Collection('users'); | |
User = Astro.Class({ | |
name: 'User', | |
collection: Users, | |
fields: { | |
name: 'string' | |
} | |
}); |
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var autoIncSave = function(doc, fieldName) { | |
while (true) { | |
var Class = doc.constructor; | |
var Collection = Class.getCollection(); | |
var sort = {}; | |
var fields = {}; | |
sort[fieldName] = -1; | |
fields[fieldName] = 1; |