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Pandas: drop a level from a multi-level column index?
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@yoonghm It is there, you are probably just calling it on columns that don't have a multi-index
– matt harrison
Dec 18 '18 at 14:59
1
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Index (zero based) must be greater than or equal to zero
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Your second String.Format uses {2} as a placeholder but you're only passing in one argument, so you should use {0} instead.
Change this:
String.Format("{2}", reader.GetString(0));
To this:
String.Format("{0}", reader.GetString(2));
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How to check if a service is running on Android?
...ow the ServiceTools class:
public class ServiceTools {
private static String LOG_TAG = ServiceTools.class.getName();
public static boolean isServiceRunning(String serviceClassName){
final ActivityManager activityManager = (ActivityManager)Application.getContext().getSystemService(C...
What's the difference between encoding and charset?
...ere are multiple encodings for Unicode. An encoding is a way of mapping a string of characters to a string of bytes. Examples of Unicode encodings include UTF-8, UTF-16 BE, and UTF-16 LE . Each of these has advantages for particular applications or machine architectures.
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Convert hex string to int
I am trying to convert a string that is 8 characters long of hex code into an integer so that I can do int comparison instead of string comparisons over a lot of different values.
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How to see which commits in one branch aren't in the other?
...rence. For example, if you have two branches, A and B, a usual way to list all commits on only one side of them is with --left-right, like the example above in the description of that option. It however shows the commits that were cherry-picked from the other branch (for example, "3rd on b" may be c...
Extracting the last n characters from a ruby string
To get the last n characters from a string, I assumed you could use
8 Answers
8
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Is It Possible to Sandbox JavaScript Running In the Browser?
... input : "bar",
callback: function(str) {
console.log("string: ", str); // string: foobar
}
}).eval({
code : "({q:1, w:2})",
callback: function(obj) {
console.log("object: ", obj); // object: object q=1 w=2
}
}).eval({
code : "[1,...
Mocking vs. Spying in mocking frameworks
...er.class)
public class MockSpyExampleTest {
@Mock
private List<String> mockList;
@Spy
private List<String> spyList = new ArrayList();
@Test
public void testMockList() {
//by default, calling the methods of mock object will do nothing
mockList.ad...
Best way to create an empty map in Java
... immutable:
Collections.emptyMap()
// or, in some cases:
Collections.<String, String>emptyMap()
You'll have to use the latter sometimes when the compiler cannot automatically figure out what kind of Map is needed (this is called type inference). For example, consider a method declared like...