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MongoDB logging all queries
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268
You can log all queries:
$ mongo
MongoDB shell version: 2.4.9
connecting to: test
> use my...
How do you know when to use fold-left and when to use fold-right?
...re, you use a left fold. Example (haskell-style pseudocode)
foldl (-) [1, 2, 3] == (1 - 2) - 3 == 1 - 2 - 3 // - is left-associative
If your operator is right-associative (right fold), the parentheses would be set like this:
A x (B x (C x D))
Example: Cons-Operator
foldr (:) [] [1, 2, 3] == 1...
What does the “map” method do in Ruby?
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432
The map method takes an enumerable object and a block, and runs the block for each element, outp...
Autoreload of modules in IPython [duplicate]
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For IPython version 3.1, 4.x, and 5.x
%load_ext autoreload
%autoreload 2
Then your module will be auto-reloaded by default. This is the doc:
File: ...my/python/path/lib/python2.7/site-packages/IPython/extensions/autoreload.py
Docstring:
``autoreload`` is an IPython extension that reloa...
Using ViewPagerIndicator library with Android Studio and Gradle
... add that dependency :
compile 'fr.avianey.com.viewpagerindicator:library:2.4.1.1@aar'
And declare maven central like this :
repositories {
mavenCentral()
}
Hope it helps...
share
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improv...
What does “|=” mean? (pipe equal operator)
...tic final int DEFAULT_SOUND = 1;
public static final int DEFAULT_VIBRATE = 2; // is the same than 1<<1 or 10 in binary
public static final int DEFAULT_LIGHTS = 4; // is the same than 1<<2 or 100 in binary
So you can use bit-wise OR to add flags
int myFlags = DEFAULT_SOUND | DEFAULT_VI...
Pretty printing JSON from Jackson 2.2's ObjectMapper
...and I can't seem to find the proper, non-deprecated way of doing this with 2.2. Even though I don't believe that code is absolutely necessary for this question, here's what I have right now:
...
How to get a DOM Element from a JQuery Selector
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266
You can access the raw DOM element with:
$("table").get(0);
or more simply:
$("table")[0];...
Is there a way to access the “previous row” value in a SELECT statement?
...here any way I can do this directly in SQL? I'm using Microsoft SQL Server 2008.
7 Answers
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Two-dimensional array in Swift
I get so confused about 2D arrays in Swift. Let me describe step by step. And would you please correct me if I am wrong.
8 ...