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Retrieve only the queried element in an object array in MongoDB collection
...operator, where the $ in a projection object field name represents the index of the field's first matching array element from the query. The following returns the same results as above:
db.test.find({"shapes.color": "red"}, {_id: 0, 'shapes.$': 1});
MongoDB 3.2 Update
Starting with the 3.2 rele...
Stretch background image css?
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.style1 {
background: url(images/bg.jpg) no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
}
Works in:
Safari 3+
Chrome Whatever+
IE 9+
Opera 10+ (Opera 9.5 supported background-size b...
How to disable all caps menu titles in Visual Studio
I assume the title is self explanatory. Just want to change the look of the Visual Studio 2012 not to show menu title in all capital letters.
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Using Case/Switch and GetType to determine the object [duplicate]
...where approriate. If this "type" is used for serialization then you'd be mixing concerns.
– Dave Van den Eynde
Apr 2 '09 at 9:27
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How can I specify a local gem in my Gemfile?
...:
$ bundle config local.GEM_NAME /path/to/local/git/repository
This is extremely helpful if you're developing two gems or a gem and a rails app side-by-side.
Note though, that this only works when you're already using git for your dependency, for example:
# In Gemfile
gem 'rack', :github => ...
Detect if Android device has Internet connection
...n server via http.
public static boolean hasActiveInternetConnection(Context context) {
if (isNetworkAvailable(context)) {
try {
HttpURLConnection urlc = (HttpURLConnection) (new URL("http://www.google.com").openConnection());
urlc.setRequestProperty("User-Agent"...
Reorder bars in geom_bar ggplot2
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Your code works fine, except that the barplot is ordered from low to high. When you want to order the bars from high to low, you will have to add a -sign before value:
ggplot(corr.m, aes(x = reorder(miRNA, -value), y = value, fill = variable)) + ...
Maximum MIMEType Length when storing type in DB
...cedures", type (eg. "application") and subtype (eg "vnd...") both can be max 127 characters. You do the math :)
Edit: Meanwhile, that document has been obsoleted by RFC 6838, which does not alter the maximum size but adds a remark:
Also note that while this syntax allows names of up to 127
ch...
How to reverse apply a stash?
...owdy all >>messages
$ git diff
diff --git a/messages b/messages
index a5c1966..eade523 100644
--- a/messages
+++ b/messages
@@ -1 +1,3 @@
Hello, world
+Hello again
+Howdy all
$ git stash show -p | patch --reverse
patching file messages
Hunk #1 succeeded at 1 with fuzz 1.
$ git diff
diff --...
Is there a working C++ refactoring tool? [closed]
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I find Visual Assist X with Visual Studio very useful. Another choice is Refactor for C++.
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