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Batch renaming files with Bash
... to remove their version numbers? I've been toying around with both expr and %% , to no avail.
10 Answers
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importing pyspark in python shell
...
Turns out that the pyspark bin is LOADING python and automatically loading the correct library paths. Check out $SPARK_HOME/bin/pyspark :
# Add the PySpark classes to the Python path:
export PYTHONPATH=$SPARK_HOME/python/:$PYTHONPATH
I added this line to my .bashrc file...
What is the difference between javac and the Eclipse compiler?
...mes with its own compiler is also apparent because you can write, compile, and run Java code in Eclipse without even installing the Java SDK.
A few examples where ECJ is preferred over javac is:
Apache Tomcat uses ECJ to compile JSPs,
IntelliJ IDEA has support for ECJ, as of GNU Compiler for Jav...
How to get the number of Characters in a String?
...ust type casting.
len([]rune("世界")) will print 2. At leats in Go 1.3.
And with CL 108985 (May 2018, for Go 1.11), len([]rune(string)) is now optimized. (Fixes issue 24923)
The compiler detects len([]rune(string)) pattern automatically, and replaces it with for r := range s call.
Adds a new run...
Why compile Python code?
...d you compile a Python script? You can run them directly from the .py file and it works fine, so is there a performance advantage or something?
...
Html.BeginForm and adding properties
...t, new { enctype="multipart/form-data"})
Or you can pass null for action and controller to get the same default target as for BeginForm() without any parameters:
Html.BeginForm(
null, null, FormMethod.Post, new { enctype="multipart/form-data"})
...
How to get last key in an array?
...
A solution would be to use a combination of end and key (quoting) :
end() advances array 's internal pointer to the last element, and returns its value.
key() returns the index element of the current array position.
So, a portion of code such as this one should do th...
What is the best way to detect a mobile device?
... attribute? I would like to run a different script if the browser is on a handheld device.
59 Answers
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What's the difference between the four File Results in ASP.NET MVC
...uld like to return as a file
FilePathResult - when you have a file on disk and would like to return its content (you give a path)
FileStreamResult - you have a stream open, you want to return its content as a file
However, you'll rarely have to use these classes - you can just use one of Controlle...
How to implement __iter__(self) for a container object (Python)
... to the sequence.
The following will create an iterator that yields five, and then every item in some_list.
def __iter__(self):
yield 5
yield from some_list
Pre-3.3, yield from didn't exist, so you would have to do:
def __iter__(self):
yield 5
for x in some_list:
yield x
...