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How can I rename a field for all documents in MongoDB?
...rmer way:
remap = function (x) {
if (x.additional){
db.foo.update({_id:x._id}, {$set:{"name.last":x.name.additional}, $unset:{"name.additional":1}});
}
}
db.foo.find().forEach(remap);
In MongoDB 3.2 you can also use
db.students.updateMany( {}, { $rename: { "oldname": "newname" } } )
T...
How can I write text on a HTML5 canvas element?
...
var canvas = document.getElementById("my-canvas");
var context = canvas.getContext("2d");
context.fillStyle = "blue";
context.font = "bold 16px Arial";
context.fillText("Zibri", (canvas.width / 2) - 17, (canvas.height / 2) + 8);
#my-canvas {
backgro...
How to split strings across multiple lines in CMake?
... that I do not know how to split a simple string into multiple lines to avoid one huge line. Consider this basic code:
7 An...
What is an example of the simplest possible Socket.io example?
...ket.IO getting started page. The API has been quite simplified since I provided this answer. That being said, here is the original answer updated small-small for the newer API.
Just because I feel nice today:
index.html
<!doctype html>
<html>
<head>
<script src='/...
Open-sided Android stroke?
Is it possible to create an Android shape object with stroke on only certain sides?
8 Answers
...
Is there a JSON equivalent of XQuery/XPath?
...
How solid is this? And I can't find a Java or C# version which is a deal killer for us.
– David Thielen
Jun 12 '12 at 18:08
...
jQuery validate: How to add a rule for regular expression validation?
I am using the jQuery validation plugin . Great stuff! I want to migrate my existing ASP.NET solution to use jQuery instead of the ASP.NET validators. I am missing a replacement for the regular expression validator. I want to be able to do something like this:
...
Adding an identity to an existing column
I need to change the primary key of a table to an identity column, and there's already a number of rows in table.
19 Answe...
Best practices for in-app database migration for Sqlite
...database version, I use the built in user-version variable that sqlite provides (sqlite does nothing with this variable, you are free to use it however you please). It starts at 0, and you can get/set this variable with the following sqlite statements:
> PRAGMA user_version;
> PRAGMA user_...
How can I position my div at the bottom of its container?
...ive;
}
#copyright {
position: absolute;
bottom: 0;
}
<div id="container">
<!-- Other elements here -->
<div id="copyright">
Copyright Foo web designs
</div>
</div>
...