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Efficiency of purely functional programming
... for problems that require a greater running time, it is possible that the extra O(log n) factor seen in the linear problem may be able to be "absorbed" in the process of extra operations necessary for algorithms with greater running times. These clarifications and open questions are explored briefl...
What's the fastest way to convert String to Number in JavaScript?
Any number, it's number. String looks like a number, it's number. Everything else, it goes NaN.
9 Answers
...
Is it good practice to use java.lang.String.intern()?
The Javadoc about String.intern() doesn't give much detail. (In a nutshell: It returns a canonical representation of the string, allowing interned strings to be compared using == )
...
What are the rules for calling the superclass constructor?
...s and the values to be passed to that classes constructor.
Class2::Class2(string id) : Class1(id) {
....
}
Also remember that if you have a constructor that takes no parameters on the parent class, it will be called automatically prior to the child constructor executing.
...
How to get the CPU Usage in C#?
...nceCounter("Memory", "Available MBytes");
Consume like this:
public string getCurrentCpuUsage(){
return cpuCounter.NextValue()+"%";
}
public string getAvailableRAM(){
return ramCounter.NextValue()+"MB";
}
...
Making a mocked method return an argument that was passed to it
...ication with a method myFunction.
public interface Application {
public String myFunction(String abc);
}
Here is the test method with a Mockito answer:
public void testMyFunction() throws Exception {
Application mock = mock(Application.class);
when(mock.myFunction(anyString())).thenAnswer(...
Permission denied on accessing host directory in Docker
...er, this specific case is different.
The dot at the end of the permission string, drwxr-xr-x., indicates SELinux is configured. When using a host mount with SELinux, you need to pass an extra option to the end of the volume definition:
The z option indicates that the bind mount content is sh...
Implement touch using Python?
...'atime', c_timespec), ('mtime', c_timespec)]
utimens = CFUNCTYPE(c_int, c_char_p, POINTER(c_utimbuf))
futimens = CFUNCTYPE(c_int, c_char_p, POINTER(c_utimbuf))
# from /usr/include/i386-linux-gnu/bits/stat.h
UTIME_NOW = ((1l << 30) - 1l)
UTIME_OMIT = ((1l << 30) - 2l)
now = c_timespe...
Java code for getting current time [duplicate]
...va.util.Calendar;
public class currentTime {
public static void main(String[] args) {
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
System.out.println( sdf.format(cal.getTime()) );
}
}
You can format SimpleDateFor...
Fetch the row which has the Max value for a column
...Y User)
EDIT: Just tried it for real:
SQL> create table MyTable (usr char(1), dt date);
SQL> insert into mytable values ('A','01-JAN-2009');
SQL> insert into mytable values ('B','01-JAN-2009');
SQL> insert into mytable values ('A', '31-DEC-2008');
SQL> insert into mytable values ('...