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Execute another jar in a Java program
...entry while creating a JAR.
>p.mf (content of p.mf)
Main-Class: pk.Test
>Test.java
package pk;
public class Test{
public static void main(String []args){
System.out.println("Hello from Test");
}
}
Use Process class and it's methods,
public class Exec
{
public static void ...
MySQL: selecting rows where a column is null
...
To search for column values that are NULL, you cannot use an expr = NULL test. The following statement returns no rows, because expr = NULL is never true for any expression
Solution
SELECT pid FROM planets WHERE userid IS NULL;
To test for NULL, use the IS NULL and IS NOT NULL operators.
opera...
How to give border to any element using css without adding border-width to the whole width of elemen
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http://caniuse.com/#feat=outline
http://caniuse.com/#search=border-box
#test, #test2 {
width: 100px;
height:100px;
background-color:yellow;
}
#test {
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
border: 10px dashed blue;
}
#test2...
how do I check in bash whether a file was created more than x time ago?
...
Only for modification time
if test `find "text.txt" -mmin +120`
then
echo old enough
fi
You can use -cmin for change or -amin for access time. As others pointed I don’t think you can track creation time.
...
Can Android Studio be used to run standard Java projects?
For those times when you want to isolate the Java and give it a quick test..
13 Answers
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std::enable_if to conditionally compile a member function
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That's unfortunate. I only tested it on with gcc. Maybe this helps: stackoverflow.com/a/17543296/660982
– jpihl
Jun 10 '14 at 7:52
1...
How to read contacts on Android 2.0
...ame="android.permission.READ_CONTACTS"/>
ContactList.java
package com.test;
import java.util.ArrayList;
public class ContactList {
private ArrayList<Contact> contacts = new ArrayList<Contact>();
public ArrayList<Contact> getContacts() {
return contacts;
}
public void s...
Why is reading lines from stdin much slower in C++ than Python?
...a look at what happens under the hood, and I've used dtruss/strace on each test.
C++
./a.out < in
Saw 6512403 lines in 8 seconds. Crunch speed: 814050
syscalls sudo dtruss -c ./a.out < in
CALL COUNT
__mac_syscall 1
...
Remove all whitespaces from NSString
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I prefer using regex like this:
NSString *myString = @"this is a test";
NSString *myNewString = [myString stringByReplacingOccurrencesOfString:@"\\s"
withString:@""
options:NSRegularExpressionSearch
...
Difference between PCDATA and CDATA in DTD
...t, but one child.
<?xml version="1.0"?>
<foo>
<bar><test>content!</test></bar>
</foo>
When we want to specify that an element will only contain text, and no child elements, we use the keyword PCDATA, because this keyword specifies that the element must c...