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How to search in array of object in mongodb
...hout $elemMatch mongo will look for users with National Medal in some year and some award in 1975s, but not for users with National Medal in 1975.
See MongoDB $elemMatch Documentation for more info. See Read Operations Documentation for more information about querying documents with arrays.
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“for” vs “each” in Ruby
...r
end
is more idiomatic. While Ruby supports looping constructs like for and while, the block syntax is generally preferred.
Another subtle difference is that any variable you declare within a for loop will be available outside the loop, whereas those within an iterator block are effectively priv...
How to create custom exceptions in Java? [closed]
... it:
public void calculate(int i) throws FooException, IOException;
... and code calling this method must either handle or propagate this exception (or both):
try {
int i = 5;
myObject.calculate(5);
} catch(FooException ex) {
// Print error and terminate application.
ex.printStackTrace()...
Unable to Connect to GitHub.com For Cloning
...t repository , but I am getting the following message when I enter the command in my Git Bash:
5 Answers
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How can I match on an attribute that contains a certain string?
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Here's an example that finds div elements whose className contains atag and btag:
//div[contains(@class, 'atag') and contains(@class ,'btag')]
However, it will also find partial matches like class="catag bobtag".
If you don't want partial matches, see bobince's answer below.
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How to Set Opacity (Alpha) for View in Android
...lar problem with a TextView. I was able to solve it, by extending TextView and overriding onSetAlpha. Maybe you could try something similar with your button:
import android.content.Context;
import android.util.AttributeSet;
import android.widget.TextView;
public class AlphaTextView extends TextVie...
Save An Image To Application Documents Folder From UIView On IOS
I have a UIImageView that allows a user to place and hold an image until it can be saved. The problem is, I can't figure out how to actually save and retrieve the image I've placed in the view.
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Listing only directories using ls in Bash?
This command lists directories in the current path: ls -d */
26 Answers
26
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How to use mysql JOIN without ON condition?
Is it possible to write join query without ON statement? and how do these joins differ LEFT JOIN, RIGHT JOIN works.
2 A...
sql server #region
can i create regions in sql server editor (like #region and #endregion in C#) ?
8 Answers
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