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.c vs .cc vs. .cpp vs .hpp vs .h vs .cxx [duplicate]
...x, on which C++ has been developed, has case sensitive file systems. So some used .C for C++ files. Other used .c++, .cc and .cxx. .C and .c++ have the problem that they aren't available on other file systems and their use quickly dropped. DOS and Windows C++ compilers tended to use .cpp, and som...
Save bitmap to location
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try (FileOutputStream out = new FileOutputStream(filename)) {
bmp.compress(Bitmap.CompressFormat.PNG, 100, out); // bmp is your Bitmap instance
// PNG is a lossless format, the compression factor (100) is ignored
} catch (IOException e) {
e.printStackTrace();
}
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ActiveRecord: List columns in table from console
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This will list the column_names from a table
Model.column_names
e.g. User.column_names
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How can I read a text file in Android?
...d the text from a text file. In the code below, an exception occurs (that means it goes to the catch block). I put the text file in the application folder. Where should I put this text file (mani.txt) in order to read it correctly?
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Get names of all keys in the collection
I'd like to get the names of all the keys in a MongoDB collection.
21 Answers
21
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How do I concatenate two text files in PowerShell?
...tenate more than two files with this style, too.
If the source files are named similarly, you can use wildcards:
Get-Content inputFile*.txt | Set-Content joinedFile.txt
Note 1: PowerShell 5 and older versions allowed this to be done more concisely using the aliases cat and sc for Get-Content and Se...
ALTER TABLE to add a composite primary key
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thanks for posting -- really got me out of battling with the ui
– plditallo
Aug 31 '13 at 3:41
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How to get the position of a character in Python?
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There are two string methods for this, find() and index(). The difference between the two is what happens when the search string isn't found. find() returns -1 and index() raises ValueError.
Using find()
>>> myString = 'Position of ...
String.Empty versus “” [duplicate]
...string, "".
In application code, this field is most commonly used in assignments to initialize a string variable to an empty string. To test whether the value of a string is String.Empty, use the IsNullOrEmpty method.
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conversion from string to json object android
...ng());
} catch (Throwable t) {
Log.e("My App", "Could not parse malformed JSON: \"" + json + "\"");
}
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