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How to check if array element exists or not in javascript?
I am working with Titanium, my code looks like this:
18 Answers
18
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Openssl is not recognized as an internal or external command
I wish to generate an application signature for my app which will later be integrated with Facebook. In one of Facebook's tutorials, I found this command:
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How can a Java variable be different from itself?
...do the same with Double.NaN.
From JLS §15.21.1. Numerical Equality Operators == and !=:
Floating-point equality testing is performed in accordance with the rules of the IEEE 754 standard:
If either operand is NaN, then the result of == is false but the result of != is true.
Indeed, the test x!=x...
How to use the pass statement?
...ut the pass, the code wouldn't run.
You would then get an:
IndentationError: expected an indented block
To summarize, the pass statement does nothing particular, but it can act as a placeholder, as demonstrated here.
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Adding :default => true to boolean in existing Rails column
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change_column is a method of ActiveRecord::Migration, so you can't call it like that in the console.
If you want to add a default value for this column, create a new migration:
rails g migration add_default_value_to_show_attribute
Then in the migration created:
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Changing a specific column name in pandas DataFrame
I was looking for an elegant way to change a specified column name in a DataFrame .
9 Answers
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Get source JARs from Maven repository
Does anyone have any idea if you can find source JARs on Maven repositories?
19 Answers
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How to build & install GLFW 3 and use it in a Linux project
Last night I was working late trying to build the GLFW 3 packages for Linux from source. This process took me a very long time, about 3 hours in total, partly because I am unfamiliar with CMake, and partly because I am was unfamiliar with GLFW.
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How to sort an array in Bash
I have an array in Bash, for example:
16 Answers
16
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API vs. Webservice [closed]
What is the difference between a webservice and an API? Is the difference more than the protocol used to transfer data?
thanks.
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