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How to set up Spark on Windows?
...o choose a Spark pre-built package for Hadoop Spark download. Download and extract it.
Set SPARK_HOME and add %SPARK_HOME%\bin in PATH variable in environment variables.
Run command: spark-shell
Open http://localhost:4040/ in a browser to see the SparkContext web UI.
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CSS technique for a horizontal line with words in the middle
...alid for different text widths, any possible background and without adding extra markup.
h1 {
overflow: hidden;
text-align: center;
}
h1:before,
h1:after {
background-color: #000;
content: "";
display: inline-block;
height: 1px;
position: relative;
vertical-align: ...
When to use inline function and when not to use it?
...e is suitable for short functions whose body doesn't necessitate including extra dependencies over what just a declaration would need. Every time the defintion is encountered it must be parsed and code for its body may be generated so it implies some compiler overhead over a function defined only on...
When should I use double or single quotes in JavaScript?
...API consistency. Other than being consistent, use whichever best suits the string.
Using the other type of quote as a literal:
alert('Say "Hello"');
alert("Say 'Hello'");
This can get complicated:
alert("It's \"game\" time.");
alert('It\'s "game" time.');
Another option, new in ECMAScript 6, is t...
UITableView row animation duration and completion callback
...tegory has always been such a pain, specially due to the long names of the extra files
– Gianni Carlo
Mar 22 '18 at 20:05
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Convert timestamp in milliseconds to string formatted time in Java
...ormat("HH:mm:ss.SSS");
formatter.setTimeZone(TimeZone.getTimeZone("UTC"));
String dateFormatted = formatter.format(date);
See SimpleDateFormat for a description of other format strings that the class accepts.
See runnable example using input of 1200 ms.
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Simple proof that GUID is not unique [closed]
...e GuidCollisionDetector
{
class Program
{
static void Main(string[] args)
{
//var reserveSomeRam = new byte[1024 * 1024 * 100]; // This indeed has no effect.
Console.WriteLine("{0:u} - Building a bigHeapOGuids.", DateTime.Now);
// Fill...
Retrieving the last record in each group - MySQL
...sible_keys | key | key_len | ref | rows | Extra |
+----+-------------+------------+--------+----------------------------+-------------+---------+--------------+---------+-------------+
| 1 | PRIMARY | <derived2> | ALL | NULL ...
Shell - Write variable contents to a file
...wever, because printf only interprets backslashes as escapes in the format string, you can use the %s format specifier to store the exact variable contents to the destination file:
printf "%s" "$var" > "$destdir"
share
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How do I write LINQ's .Skip(1000).Take(100) in pure SQL?
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Thanks for the extra performance info, will have to be careful and test it.
– Ray
Nov 16 '09 at 21:16
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