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Are JavaScript strings immutable? Do I need a “string builder” in JavaScript?
Does javascript use immutable or mutable strings? Do I need a "string builder"?
10 Answers
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How set background drawable programmatically in Android
...drawable.ready); is correct.
Another way to achieve it is to use the following:
final int sdk = android.os.Build.VERSION.SDK_INT;
if(sdk < android.os.Build.VERSION_CODES.JELLY_BEAN) {
layout.setBackgroundDrawable(ContextCompat.getDrawable(context, R.drawable.ready) );
} else {
layout.set...
Call a function from another file?
Set_up: I have a .py file for each function I need to use in a program.
17 Answers
17
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Iterating through a list in reverse order in java
I'm migrating a piece of code to make use of generics. One argument for doing so is that the for loop is much cleaner than keeping track of indexes, or using an explicit iterator.
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ANTLR: Is there a simple example?
I'd like to get started with ANTLR, but after spending a few hours reviewing the examples at the antlr.org site, I still can't get a clear understanding of the grammar to Java process.
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How to set a default value for a datetime column to record creation time in a migration?
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This is supported now in Rails 5.
Here is a sample migration:
class CreatePosts < ActiveRecord::Migration[5.0]
def change
create_table :posts do |t|
t.datetime :modified_at, default: -> { 'CURRENT_TIMESTAMP' }
t.timestam...
Declaring functions in JavaScript [duplicate]
What's the difference between these two ways of declaring a function?
8 Answers
8
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How do you import classes in JSP?
I am a complete JSP beginner. I am trying to use a java.util.List in a JSP page. What do I need to do to use classes other than ones in java.lang ?
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What does the (unary) * operator do in this Ruby code?
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The * is the splat operator.
It expands an Array into a list of arguments, in this case a list of arguments to the Hash.[] method. (To be more precise, it expands any object that responds to to_ary/to_a, or to_a in Ruby 1.9.)
To illustrate, the following two statements are...
How to print to console in pytest?
I'm trying to use TDD (test-driven development) with pytest .
pytest will not print to the console when I use print .
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