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Install Application programmatically on Android
I'm interested in knowing if it is possible to programmatically install a dynamically downloaded apk from a custom Android application.
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What is the difference between “instantiated” and “initialized”?
...iables in C# are in 1 of 2 groups. Value types or Reference types. Types like int and DateTime are value types. In contrast, any class you create is a reference type. C# strings are also a reference type. Most things in the .NET framework are reference types.
Parts of a Variable
There is the varia...
vertical & horizontal lines in matplotlib
...ble to create horizontal and vertical lines at specified limits. I would like to bound the data by this box. However, the sides do not seem to comply with my instructions. Why is this?
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Indenting #defines
I know that #define s, etc. are normally never indented. Why?
8 Answers
8
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Java Class.cast() vs. cast operator
...) to avoid warnings in "generics land". I often see methods doing things like this:
@SuppressWarnings("unchecked")
<T> T doSomething() {
Object o;
// snip
return (T) o;
}
It's often best to replace it by:
<T> T doSomething(Class<T> cls) {
Object o;
// snip
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In C# what is the difference between ToUpper() and ToUpperInvariant()?
... ToUpperInvariant uses the invariant culture.
The canonical example is Turkey, where the upper case of "i" isn't "I".
Sample code showing the difference:
using System;
using System.Drawing;
using System.Globalization;
using System.Threading;
using System.Windows.Forms;
public class Test
{
[S...
std::string to char*
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It won't automatically convert (thank god). You'll have to use the method c_str() to get the C string version.
std::string str = "string";
const char *cstr = str.c_str();
Note that it returns a const char *; you aren't allowed to change the C-style string re...
Test if object implements interface
This has probably been asked before, but a quick search only brought up the same question asked for C#. See here.
7 Answer...
How do I turn on SQL debug logging for ActiveRecord in RSpec tests?
I have some RSpec tests for my models and I would like to turn on SQL ActiveRecord logging just like I see in the Rails server mode. How to do that?
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String concatenation in Ruby
I am looking for a more elegant way of concatenating strings in Ruby.
16 Answers
16
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