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How can I trim leading and trailing white space?
...he best way is to handle the trailing white spaces when you read your data file. If you use read.csv or read.table you can set the parameterstrip.white=TRUE.
If you want to clean strings afterwards you could use one of these functions:
# Returns string without leading white space
trim.leading <- ...
node.js hash string?
...
Take a look at crypto.createHash(algorithm)
var filename = process.argv[2];
var crypto = require('crypto');
var fs = require('fs');
var md5sum = crypto.createHash('md5');
var s = fs.ReadStream(filename);
s.on('data', function(d) {
md5sum.update(d);
});
s.on('end', fun...
How can I use functional programming in the real world? [closed]
...ally link all its dependencies, so you don't need to deploy the F# runtime files. One other thing that makes CLR code attractive is that you can pass managed code (delegates) to C code, and the runtime automatically makes a thunk for you.
If you decide to go the Haskell way, the feature you'll be l...
What happens when a computer program runs?
...ually used in POSIX binaries. POSIX boxes (almost universally) use the ELF file format. In this format, the operating system is responsible for communications between libraries in different ELF files. Therefore, all the libraries use position-independent code (That is, the code itself can be loaded ...
How to change webservice url endpoint?
...
To change the end address property edit your wsdl file
<wsdl:definitions.......
<wsdl:service name="serviceMethodName">
<wsdl:port binding="tns:serviceMethodNameSoapBinding" name="serviceMethodName">
<soap:address location="http://service_end_p...
How to deal with “java.lang.OutOfMemoryError: Java heap space” error?
... being conservative on memory usage. The user can open unlimited number of files, and the program keeps the opened objects in the memory. After a quick research I found Ergonomics in the 5.0 Java Virtual Machine and others saying on Windows machine the JVM defaults max heap size as 64MB .
...
How to make a python, command-line program autocomplete arbitrary things NOT interpreter
...ands, extending bash's own tab-completion.
In a nutshell, you'll create a file containing a shell-function that will generate possible completions, save it into /etc/bash_completion.d/ and register it with the command complete. Here's a snippet from the linked page:
_foo()
{
local cur prev op...
Code First: Independent associations vs. Foreign key associations?
...eferences. If you don't want to use them you must manually modify the EDMX file and add properties representing FKs. At least this was the case in Entity Framework v1 where only Independent associations were allowed.
Entity framework v4 offers a new type of association called Foreign key associatio...
What is the purpose of the “Prefer 32-bit” setting in Visual Studio and how does it actually work?
...o turn it off. Even worse, you can't search for it since not in the csproj files unless turned off! Probably added because of the Office Automation incompatibilities with CPUAny on a x64 machine with most folks installing 32 bit Office.
– Dave
Oct 31 '13 at 16:...
Render HTML to PDF in Django site
... urls.py:
# urls.py (using url namespaces defined in the main urls.py file)
url(
regex=r"^(?P<pk>\d+)/generate_pdf/$",
view=views.GroupPDFGenerate.as_view(),
name="generate_pdf",
),
...