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How to check if the user can go back in browser history or not
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May I know what do you mean by 'The problem with this is that in most browsers this is considered a security violation' Another user in another thread also pointed that being able to get client's browser history is violating the security, but doesn't e...
Go build: “Cannot find package” (even though GOPATH is set)
...just fine.
Additional recommended steps:
Add $GOPATH/bin to your $PATH by: PATH="$GOPATH/bin:$PATH"
Move main.go to a subfolder of $GOPATH/src, e.g. $GOPATH/src/test
go install test should now create an executable in $GOPATH/bin that can be called by typing test into your terminal.
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What are the benefits to marking a field as `readonly` in C#?
...t from other types of read-only semantics because it's enforced at runtime by the CLR. The readonly keyword compiles down to .initonly which is verifiable by the CLR.
The real advantage of this keyword is to generate immutable data structures. Immutable data structures by definition cannot be ch...
Jasmine.js comparing arrays
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this falls back on "==" in javascript by default. This is just not safe since not only the actual values are compared, but the whole object.
– Peter
Nov 12 '14 at 11:00
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Examples of Algorithms which has O(1), O(n log n) and O(log n) complexities
...h every iteration
O(n log n) time
The factor of 'log n' is introduced by bringing into consideration Divide and Conquer. Some of these algorithms are the best optimized ones and used frequently.
Merge Sort
Heap Sort
Quick Sort
Certain Divide and Conquer Algorithms based on optimizing O(n^2) a...
Scatter plot and Color mapping in Python
...to the bottom/top of the colormap.
Colormaps
You can change the colormap by adding
import matplotlib.cm as cm
plt.scatter(x, y, c=t, cmap=cm.cmap_name)
Importing matplotlib.cm is optional as you can call colormaps as cmap="cmap_name" just as well. There is a reference page of colormaps showing...
How to get Maven project version to the bash command line
...something for this:
help:evaluate evaluates Maven expressions given by the user in an interactive mode.
Here is how you would invoke it on the command line to get the ${project.version}:
mvn org.apache.maven.plugins:maven-help-plugin:2.1.1:evaluate \
-Dexpression=project.version
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Relative imports in Python 2.7
... is in. That depends, additionally, on how you load the file into Python (by running or by importing).
There are two ways to load a Python file: as the top-level script, or as a
module. A file is loaded as the top-level script if you execute it directly, for instance by typing python myfile.py o...
Select all 'tr' except the first one
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By adding a class to either the first tr or the subsequent trs. There is no crossbrowser way of selecting the rows you want with CSS alone.
However, if you don't care about Internet Explorer 6, 7 or 8:
tr:not(:first-child) ...
Is JavaScript's “new” keyword considered harmful?
.... It can be a bit frustrating at times.
Use of the functionality provided by the new keyword has several advantages over building each object from scratch:
Prototype inheritance. While often looked at with a mix of suspicion and derision by those accustomed to class-based OO languages, JavaScript...