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Drawing an image from a data URL to a canvas
...For example:
var img = new Image;
img.src = strDataURI;
The drawImage() m>me m>thod of HTML5 Canvas Context lets you copy all or a portion of an image (or canvas, or video) onto a canvas.
You might use it like so:
var myCanvas = docum>me m>nt.getElem>me m>ntById('my_canvas_id');
var ctx = myCanvas.getContext(...
mongodb/mongoose findMany - find all docum>me m>nts with IDs listed in array
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The find function in mongoose is a full query to mongoDB. This m>me m>ans you can use the handy mongoDB $in clause, which works just like the SQL version of the sam>me m>.
model.find({
'_id': { $in: [
mongoose.Types.ObjectId('4ed3ede8844f0f351100000c'),
mongoose.Types.ObjectId...
How to add Active Directory user group as login in SQL Server
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In SQL Server Managem>me m>nt Studio, go to Object Explorer > (your server) > Security > Logins and right-click New Login:
Then in the dialog box that pops up, pick the types of objects you want to see (Groups is disabled by default - che...
Apply CSS style attribute dynamically in Angular JS
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ngStyle directive allows you to set CSS style on an HTML elem>me m>nt dynamically.
Expression which evals to an object whose keys are CSS style nam>me m>s and values are corresponding values for those CSS keys. Since som>me m> CSS style nam>me m>s are not valid keys for an object, they must be quoted...
postgresql COUNT(DISTINCT …) very slow
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You can use this:
SELECT COUNT(*) FROM (SELECT DISTINCT column_nam>me m> FROM table_nam>me m>) AS temp;
This is much faster than:
COUNT(DISTINCT column_nam>me m>)
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How can I build multiple submit buttons django form?
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You can use self.data in the clean_email m>me m>thod to access the POST data before validation. It should contain a key called newsletter_sub or newsletter_unsub depending on which button was pressed.
# in the context of a django.forms form
def clean(self):
if 'new...
Error Dropping Database (Can't rmdir '.test\', errno: 17)
...e directory is intended for storage of table data.
The DROP DATABASE statem>me m>nt will remove all table files and then remove the directory that represented the database. It will not, however, remove non-table files, whereby making it not possible to remove the directory.
MySQL displays an error m>me m>s...
XML Validation with XSD in Visual Studio IDE
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You'll need to associate the XML docum>me m>nt in Visual Studio with the XSD file you have.
You should see som>me m>thing like this in your Properties window of the XML docum>me m>nt:
In the XML schema set editor (opens when you click on the (...) ellipsis in the "Schemas"...
showDialog deprecated. What's the alternative?
Is there som>me m>thing else that should be called?
5 Answers
5
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Inserting a Link to a Webpage in an IPython Notebook
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For m>me m>, certain special characters like "(" or ")" may brake the file/page path and lead to the link not working. I fixed it by replacing them with the code equivalents found here and then everything worked. theukwebdesigncompany...