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How to get default gateway in Mac OSX
...sult thus looks like this:
192.168.195.1
In this case, netstat displays all result, grep only selects the line with 'default' in it, and awk further matches the pattern to display the second column in the text.
You can similarly use route -n get default command to get the required result. The fu...
Is it good style to explicitly return in Ruby?
...d
Was this meant to be a function that returned a value, or not? It's really hard to say what the developer meant, as it both assigns the instance variable, AND returns the value assigned as well.
Suppose much later, another programmer (perhaps not that familiar with how Ruby does returns based ...
How to keep index when using pandas merge
...ng multi-index, your indices will be stored as a tuple in a single column called a[copy_index]
– geekidharsh
Nov 6 '19 at 6:19
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Waiting until two async blocks are executed before starting another block
...
NSLog(@"Block3");
});
// only for non-ARC projects, handled automatically in ARC-enabled projects.
dispatch_release(group);
and could produce output like this:
2012-08-11 16:10:18.049 Dispatch[11858:1e03] Block1
2012-08-11 16:10:18.052 Dispatch[11858:1d03] Block2
2012-08-11 16:10:23.051 Dis...
How does the SQL injection from the “Bobby Tables” XKCD comic work?
...t'); DROP TABLE STUDENTS; --) and the last name textbox LName.Text (let's call it Derper) are concatenated with the rest of the query, the result is now actually two queries separated by the statement terminator (semicolon). The second query has been injected into the first. When the code executes...
Why doesn't String switch statement support a null case?
...st by Christian Hujer has some insightful speculation about why null isn't allowed in switches (although it centers on the enum switch rather than the String switch):
Under the hood, the switch statement will typically compile to a tablesswitch byte code. And the "physical" argument to switch as we...
How do I grant myself admin access to a local SQL Server instance?
I installed SQL Server 2008 R2 to my local machine. But, I can't create a new database because of rights (or lack of).
6 An...
How to convert a number to string and vice versa in C++
...o-number conversion and vice-versa are built in into the standard library. All the following functions are present in <string> (as per paragraph 21.5).
string to numeric
float stof(const string& str, size_t *idx = 0);
double stod(const string& str, size_t *id...
How can I change my Cygwin home folder after installation?
I just installed Cygwin, and it looks like the home directory in the bash prompt is on my Z: drive. That's not where I want it.
...
Difference between a “coroutine” and a “thread”?
...the baton among each other more fluidly).
Threads are (at least conceptually) a form of concurrent processing: multiple threads may be executing at any given time. (Traditionally, on single-CPU, single-core machines, that concurrency was simulated with some help from the OS -- nowadays, since so...