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Getting the location from an IP address [duplicate]
...ant to retrieve information like the city, state, and country of a visitor from their IP address, so that I can customize my web page according to their location. Is there a good and reliable way to do this in PHP? I am using JavaScript for client-side scripting, PHP for server-side scripting, and M...
How is “=default” different from “{}” for default constructor and destructor?
...e constructors/assignment, destructors etc) means something very different from simply doing {}. With the latter, the function becomes "user-provided". And that changes everything.
This is a trivial class by C++11's definition:
struct Trivial
{
int foo;
};
If you attempt to default construct o...
Visual Studio 2013 doesn't discover unit tests
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Some things I've noticed I have to do from time to time to get tests to show up properly.
If your solution is in a protected drive that you need administrator access to read/write, sometimes only a portion of the tests come up. Definitely run VS as administrato...
Read/Write String from/to a File in Android
I want to save a file to the internal storage by getting the text inputted from EditText. Then I want the same file to return the inputted text in String form and save it to another String which is to be used later.
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UITableView : viewForHeaderInSection: not called during reloadData:
...it won't be called. Check the case too. Also make sure you are returning 0 from numberOfSections.
– rmaddy
Feb 26 '13 at 2:23
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How can I convert tabs to spaces in every file of a directory?
... @DavidW. I would simply update this command to only replace tabs from the beginning of the line. find ./ -type f -exec sed -i 's/^\t/####/g' {} \;. But I wasn't aware of the expand command - very useful!
– Martin Konecny
May 7 '14 at 16:08
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What is the behavior of integer division?
... the operands.
and:
5 The result of the / operator is the
quotient from the division of the
first operand by the second; the
result of the % operator is the
remainder. In both operations, if the
value of the second operand is zero,
the behavior is undefined.
[Note: Emphasis mine]...
“implements Runnable” vs “extends Thread” in Java
From what time I've spent with threads in Java, I've found these two ways to write threads:
42 Answers
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Cloning an Object in Node.js
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From what I can tell the object spread operator is not an ES6 thing but instead a stage 3 proposal. which means you can use it with babel but not without from what I understand. github.com/tc39/…
– mac...
How do you delete a column by name in data.table?
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Any of the following will remove column foo from the data.table df3:
# Method 1 (and preferred as it takes 0.00s even on a 20GB data.table)
df3[,foo:=NULL]
df3[, c("foo","bar"):=NULL] # remove two columns
myVar = "foo"
df3[, (myVar):=NULL] # lookup myVar contents...