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data.table vs dplyr: can one do something well the other can't or does poorly?
...ters. As Grace Hopper would say, Mind your nanoseconds!
3. Syntax
Let's now look at syntax. Hadley commented here:
Data tables are extremely fast but I think their concision makes it harder to learn and code that uses it is harder to read after you have written it ...
I find this remark poi...
Where to store global constants in an iOS application?
... way, you can switch between servers depending on compiler flags, as in:
#ifdef DEBUG
#define kBaseURL @"http://192.168.0.123/"
#else
#define kBaseURL @"http://myproductionserver.com/"
#endif
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Running V8 Javascript Engine Standalone
...$> scons
$> g++ ./samples/shell.cc -o v8-shell -I include libv8.a
Now, we have a standalone binary called v8-shell.
Running the console:
$> ./v8-shell
V8 version 2.0.2
> var x = 10;
> x
10
> function foo(x) { return x * x; }
> foo
function foo(x) { return x * x; }
> qu...
Configuring Vim for C++
...ject
C++ category in Vim Tips wiki
Luc Hermitte's C/C++ plugin
Not C++ specific but I also recommend either FuzzyFinder or Command-T or Unite for file navigation. With either of these, you don't even need tabs (which does not scale for 10+ files) to manage your project.
Class navigation: Taglist or...
Parsing query strings on Android
...() worked, but was deprecated in L, and removed in M.
So the best answer now is UrlQuerySanitizer. This has existed since API level 1 and still exists. It also makes you think about the tricky issues like how do you handle special characters, or repeated values.
The simplest code is
UrlQuerySan...
Count how many records are in a CSV Python?
...akes for an efficient counter, avoiding storing the whole file in memory.
If you already read 2 rows to start with, then you need to add those 2 rows to your total; rows that have already been read are not being counted.
sh...
Rails params explained?
...which is the most common, the params are encoded in the url. For example, if a user's browser requested
http://www.example.com/?foo=1&boo=octopus
then params[:foo] would be "1" and params[:boo] would be "octopus".
In HTTP/HTML, the params are really just a series of key-value pairs where the...
Change the image source on rollover using jQuery
...on() {
var src = $(this).attr("src").match(/[^\.]+/) + "over.gif";
$(this).attr("src", src);
})
.mouseout(function() {
var src = $(this).attr("src").replace("over.gif", ".gif");
$(this).attr("src", src);
});
});
For those tha...
Django - how to create a file and save it to a model's FileField?
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In addition to this, I got an error if I don't specify the file mode while opening the file. So, f = open('/path/to/file', 'r') For ZIP kind of file, f = open('/path/to/file.zip', 'rb')
– rajagopalx
Dec 14 '17 at 19:43
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JavaScript/JQuery: $(window).resize how to fire AFTER the resize is completed?
...
This is now what I am using,
– Bharat Patil
Feb 11 '14 at 7:16
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