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What is an optional value in Swift?
...String are completely different types.
Here's the most important thing to know: An optional is a kind of container. An optional String is a container which might contain a String. An optional Int is a container which might contain an Int. Think of an optional as a kind of parcel. Before you open it ...
What is the meaning of “$” sign in JavaScript
... @Paolo: Often, yes. There was however no indication the OP wanted to know about this. A direct answer is also a good thing. :) Saying that, I would still agree this is a better answer. My only quibble was with the emphasis you were placing on a specific point.
– Noldorin
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Error :: duplicate files during packaging of APK
...
Sorry Xavier. I didn't understood your answer then. Now I can see what did you mean. I tried to change to exclude 'META-INF/notice.txt' but then console prompted that Duplicate files copied in APK META-INF/NOTICE.txt. Strange, isn't it? There is no resources directory under C:...
Proper use cases for Android UserManager.isUserAGoat()?
...;As of {@link android.os.Build.VERSION_CODES#LOLLIPOP}, this method can
* now automatically identify goats using advanced goat recognition technology.</p>
*
* @return Returns true if the user making this call is a goat.
*/
public boolean isUserAGoat() {
return mContext.getPackageManage...
When to use symbols instead of strings in Ruby?
If there are at least two instances of the same string in my script, should I instead use a symbol?
4 Answers
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Android Facebook integration with invalid key hash
...h key through a command prompt is working on the first time only. I don't know the reason. I have also got the same problem. So I tried it through programmatically.
Follow these steps:
Paste the following code in oncreate().
try {
PackageInfo info = getPackageManager().getPackageInfo(
...
JSON to pandas DataFrame
...t I load the dict (one at a time)
n = data.loc[row,'dict_column']
#Now I make a new column that pulls out the data that I want.
data.loc[row,'new_column'] = n.get('key')
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Best way to define error codes/strings in Java?
...g or whatever*/ id();
}
public interface IMessage {
ICode code();
}
Now you can define any number of enums which provide me
ERROR: Error installing capybara-webkit:
... Note that if you want to install version 5.5 specifically, you will now need to do brew install homebrew/versions/qt55.
– jlleblanc
Nov 17 '16 at 21:13
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Match multiline text using regular expression
...e very end (or before a newline at the end, but we'll leave that aside for now). But if the string contains newlines, you can choose for ^ and $ to match at the start and end of any logical line, not just the start and end of the whole string, by setting the MULTILINE flag.
So forget about what MU...