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mongo group query how to keep fields
...e first matching entries for each group, you can try aggregating like:
db.test.aggregate({
$group: {
_id : '$name',
name : { $first: '$name' },
age : { $first: '$age' },
sex : { $first: '$sex' },
province : { $first: '$province' },
city : { $first: '$city' },
area : { $first:...
How can I prevent the scrollbar overlaying content in IE10?
...@tmsimont Good point. Also, they seem to have changed the comment in the latest Boostrap source file (updated my answer with the new comments), which now mentions the use of a UA sniffing script to apply this to "only the Surface/desktop Windows 8" - check out the issue link github.com/twbs/bootstra...
How to really read text file from classpath in Java
... example, take this code:
package dummy;
import java.io.*;
public class Test
{
public static void main(String[] args)
{
InputStream stream = Test.class.getResourceAsStream("/SomeTextFile.txt");
System.out.println(stream != null);
stream = Test.class.getClassLoader(...
Quickly find whether a value is present in a C array?
...s of utmost importance, the C compiler will most likely not produce the fastest code compared to what you can do with hand tuned assembly language. I tend to take the path of least resistance - for small routines like this, I just write asm code and have a good idea how many cycles it will take to e...
Test if a vector contains a given element
How to check if a vector contains a given value?
7 Answers
7
...
How to convert strings into integers in Python?
... return True
except Exception:
return False
x = "1"
y = "test"
x_test = is_number(x)
print(x_test)
It should print to IDLE True because x is a number.
y_test = is_number(y)
print(y_test)
It should print to IDLE False because y in not a number.
...
How to create a file in memory for user to download, but not through server?
...
It does work in Chrome now (tested against v20 and v21) but not IE9 (that might just be the jsFiddle, but somehow I doubt it).
– earcam
Aug 30 '12 at 16:20
...
How in node to split string by newline ('\n')?
...de to split string by newline ('\n') ?
I have simple string like var a = "test.js\nagain.js" and I need to get ["test.js", "again.js"] .
I tried
...
How to fix: “No suitable driver found for jdbc:mysql://localhost/dbname” error when using pools? [du
I am trying to create a connection to my database, when I put test my code using the main method, it works seamlessly. However, when trying to access it through Tomcat 7, it fails with error:
...
Count the number of occurrences of a character in a string in Javascript
...t("str").length - 1) //4
Both in @Lo's answer and in my own silly jsperf test split comes ahead in speed, at least in Chrome, but again creating the extra array just doesn't seem sane.
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