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How to select a single field for all documents in a MongoDB collection?
...a method called `projection that you would append to your find function in order to project.
Following the same example set, commands like the following can be used with Node:
db.student.find({}).project({roll:1})
SELECT _id, roll FROM student
Or
db.student.find({}).project({roll:1, _id: 0})...
What are the Dangers of Method Swizzling in Objective-C?
...ode
Possible naming conflicts
Swizzling changes the method's arguments
The order of swizzles matters
Difficult to understand (looks recursive)
Difficult to debug
These points are all valid, and in addressing them we can improve both our understanding of method swizzling as well as the methodology ...
How to post JSON to a server using C#?
... it is possible to leverage the using statement's default functionality in order to omit explicitly calling Flush and Close.
var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://url");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
using (var streamWrite...
Remove Server Response Header IIS7
...stem.webServer. Beware, this will crash your site if UrlRewrite is not installed on the server. And you'd better use the IIS configuration console first to check how it write down those config nodes.
– Frédéric
Sep 4 '15 at 19:31
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Iterating over all the keys of a map
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As a possible gotcha, note that the order of the iteration is undefined. groups.google.com/d/msg/golang-nuts/YfDxpkI34hY/4pktJI2ytusJ
– mna
Sep 22 '12 at 2:18
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Keep overflow div scrolled to bottom unless user scrolls up
... support flex-box, the only caveat is that the markup has to be in reverse order.
Here is a working example. https://codepen.io/jimbol/pen/YVJzBg
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Download file from web in Python 3
...download_and_keep_on_memory(URL('http://statics.591.com.tw/tools/showPhone.php?info_data=rLsGZe4U%2FbphHOimi2PT%2FhxTPqI&type=rLEFMu4XrrpgEw'),
headers, # You may need this. Otherwise, some websites will send the 404 error to you.
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Dealing with nginx 400 “The plain HTTP request was sent to HTTPS port” error
...d passenger/nginx. I'm trying to get it to respond to both http and https calls. The problem is, when both are defined in the server block https calls are responded to normally but http yields a 400 "The plain HTTP request was sent to HTTPS port" error. This is for a static page so I'm guessing Sina...
How to serialize SqlAlchemy result to JSON?
...inst cases where a relationship is repeated? For example, if I have online_order and address, both with a relationship to user, but online_order also has an relationship to address. If I wanted to serialize all of this, I'd have to include address in the fields_to_expand, but I wouldn't want to redu...
How to strip HTML tags from string in JavaScript? [duplicate]
... null
The HTML comes from a trusted source. Using this with arbitrary HTML allows arbitrary untrusted JavaScript to be executed. This example is from a comment by Mike Samuel on the duplicate question: <img onerror='alert(\"could run arbitrary JS here\")' src=bogus>
Code:
var html = "<p&...