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How to debug Ruby scripts [closed]
...Advice
When you are trying to debug a problem, good advice is to always: Read The !@#$ing Error Message (RTFM)
That means reading error messages carefully and completely before acting so that you understand what it's trying to tell you. When you debug, ask the following mental questions, in thi...
How to know what the 'errno' means?
...
You can use strerror() to get a human-readable string for the error number. This is the same string printed by perror() but it's useful if you're formatting the error message for something other than standard error output.
For example:
#include <errno.h>
...
How do I escape characters in c# comments?
...amp;gt; ? I don't like if that is the case since I want to make it easy to read the comment in the actual document so I don't have to generate some kind of code document to be able to read the example code.
...
What is the difference between encrypting and signing in asymmetric encryption?
... use their public key to write a message and they use their private key to read it.
When signing, you use your private key to write message's signature, and they use your public key to check if it's really yours.
I want to use my private key to generate messages so only I can possibly be the sender...
How to search file text for a pattern and replace it with a given value
...mes = ['foo.txt', 'bar.txt']
file_names.each do |file_name|
text = File.read(file_name)
new_contents = text.gsub(/search_regexp/, "replacement string")
# To merely print the contents of the file, use:
puts new_contents
# To write changes to the file, use:
File.open(file_name, "w") {|f...
What's the difference between encoding and charset?
...oc wrongly uses "charset" instead of "encoding", for example in InputStreamReader, we read "An InputStreamReader is a bridge from byte streams to character streams: It reads bytes and decodes them into characters using a specified charset. The charset that it uses may be specified by name or may be ...
Execute SQLite script
...ays to do this, one way is:
sqlite3 auction.db
Followed by:
sqlite> .read create.sql
In general, the SQLite project has really fantastic documentation! I know we often reach for Google before the docs, but in SQLite's case, the docs really are technical writing at its best. It's clean, clear,...
Javascript: get package.json data in gulpfile.js
...p watch process it would be best to use bitlinguist's method as it will re-read the file and parse it each time that your task is executed.
var fs = require('fs');
var json = JSON.parse(fs.readFileSync('./package.json'));
...
How to download and save a file from Internet using Java?
...and save to a directory. I know there are several methods for grabbing and reading online files (URLs) line-by-line, but is there a way to just download and save the file using Java?
...
TypeError: Cannot read property 'then' of undefined
...
TypeError: Cannot read property 'then' of undefined when calling a Django service using AngularJS.
If you are calling a Python service, the code will look like below:
this.updateTalentSupplier=function(supplierObj){
var promise = $http({...