command-line-interface

I have started working with Cassandra database. I am planning to use Datastax API to upsert/read into/from cassandra database. I am totally new to this Datastax API (which uses new Binary protocol) and I am not able to find lot of documentations as well which have some proper examples. When I was working with Cassandra CLI using the Netflix client(Astyanax client), then I created the column family like this- create column family profile with key_validation_class = 'UTF8Type' and comparator = 'UTF8Type' and default_validation_class = 'UTF8Type' and column_metadata = [ {column_name : crd,

How can I pass an fstream or equivalent from C# through CLI to an unmanaged C++ DLL? Rough application outline: C# application reads a binary file from a database Unmanaged C++ dll is used to "decode" this file and return the information contained therein I can modify any of the C# code. The CLI wrapper is the only portion of the C++ side that I can modify. I'm currently saving the binary file to disk and passing the path of it to the CLI wrapper where it is opened as an fstream. This is fine for test purposes, but won't work for production for obvious reasons. I've also looked into passing a

This question already has an answer here: Delete lines in a text file that contain a specific string 14 answers I'd like to give a keyword, find the line where this keyword aṕpears in a file and erase the entire line. This is what I got but it is not working as it should: KEYWORD='domain.com' cat /etc/hosts | grep -v "$KEYWORD" > /etc/hosts UPDATE This is what worked for me: sed -i_bak -e '/domain\.com/d' /etc/hosts However, as I had two lines with "domain.com", is there a way to tell sed to erase only the line where the exact keyword "domain.com" appears This is the original content of /etc

The question may be not clear enough to get. Let me clear in details. I'm using python cmd library to implement my own CLI framework and when hit the enter button without typing any command it executes last command. This it not one I wanna do. mycli~: cmd --args executes command execution stops mycli~:[hit enter button] Then it will execute again cmd --args. However I just want to go down with new line. def emptyline(self): pass Will do just fine! After a long googling I could not find a valuable advise to prevent this. I decide to go inside the cmd library and override the method. I figured

In the below cassandra, "get result"..we can able to retrieve the column name and values. But how to retrieve the timestamp..Is there any better idea to get the values by using timestamp [default@sample]get user[bob]; => (column=name, value=bobdroid, timestamp=1335361733545850) => (column=email, value=bob@gmail.com, timestamp=1335361733545850) => (column=age, value=23, timestamp=1335361733545850) => (column=password, value=MTIz, timestamp=1335361733545850) Returned 4 results. Elapsed time: 4 msec(s). It's not recommended to use column Cassandra timestamps directly in client code; ideally, you

Given a json file in the format as : [ { name : "A", value : "1" }, { name : "B", value : "5" }, { name : "E", value : "8" } ] How would I convert it to something like this using jq: { "A" : { name : "A", value : "1" }, "B" : { name : "B", value : "5" }, "E" : { name : "E", value : "8" } } jq '{(.[].name) : "the name"}' 'myfile.json' gets me an object with [].name keys but how do I assign the object to it? map( { (.name|tostring): . } ) | add (The tostring is for safety/robustness.) INDEX/1 If your jq has INDEX/1 (introduced after the release of version 1.5), you can simply write: INDEX(.name)

I'm writing a command line interface for one of my programs, and I would like to use the colorized output of winston if it's appropriate (the output is a terminal and it's not redirected to a file). In bash it can be done with the -t test as this SO answer correctly says. But I'm looking for the node.js alternative for testing this. loganfsmyth Similarly to the bash examples you link to, Node has the 'tty' module to deal with this. To check if output is redirected, you can use the 'isatty' method. Docs here: http://nodejs.org/docs/v0.5.0/api/tty.html#tty.isatty For example to check if stdout