How to get current timestamp in string format in Java? “yyyy.MM.dd.HH.mm.ss”
Replace with because there is no default constructor for Timestamp, or you can do it with the method:
Difference between paste() and paste0()
As explained in this blog by Tyler Rinker: paste has 3 arguments. paste (…, sep = ” “, collapse = NULL) The … is the stuff you want to paste together and sep and collapse are the guys to get it done. There are three basic things I paste together: A bunch of individual character strings. 2 or more strings … Read more
PowerShell says “execution of scripts is disabled on this system.”
If you’re using Windows Server 2008 R2 then there is an x64 and x86 version of PowerShell both of which have to have their execution policies set. Did you set the execution policy on both hosts? As an Administrator, you can set the execution policy by typing this into your PowerShell window: For more information, see Using the Set-ExecutionPolicy Cmdlet. When you are … Read more
grep –ignore-case –only
This is a known bug on the initial 2.5.1, and has been fixed in early 2007 (Redhat 2.5.1-5) according to the bug reports. Unfortunately Apple is still using 2.5.1 even on Mac OS X 10.7.2. You could get a newer version via Homebrew (3.0) or MacPorts (2.26) or fink (3.0-1). Edit: Apparently it has been fixed on OS X 10.11 (or maybe earlier), even … Read more
What are type hints in Python 3.5?
I would suggest reading PEP 483 and PEP 484 and watching this presentation by Guido on type hinting. In a nutshell: Type hinting is literally what the words mean. You hint the type of the object(s) you’re using. Due to the dynamic nature of Python, inferring or checking the type of an object being used is especially hard. This fact makes it hard for developers to understand what … Read more
How do I parse command line arguments in Bash?
Bash Space-Separated (e.g., –option argument) Output from copy-pasting the block above Usage Bash Equals-Separated (e.g., –option=argument) Output from copy-pasting the block above Usage To better understand ${i#*=} search for “Substring Removal” in this guide. It is functionally equivalent to `sed ‘s/[^=]*=//’ <<< “$i”` which calls a needless subprocess or `echo “$i” | sed ‘s/[^=]*=//’` which calls two needless subprocesses. Using bash with getopt[s] getopt(1) limitations (older, … Read more
Sign in with Google temporarily disabled for this app
I found this thread some time ago when this happened to us in our development project on Google Cloud Platform. You can use a project for development without verification. No problem on that. But there are some limitations (more information here and here). Basically, we reached the limit of 100 users accessing the application. It was strange because … Read more
Rename column SQL Server 2008
Use sp_rename See: SQL SERVER – How to Rename a Column Name or Table Name Documentation: sp_rename (Transact-SQL) For your case it would be: Remember to use single quotes to enclose your values.
Is there a way to get all IP addresses of youtube to block it with Windows Firewall?
If you have your own DNS server you can block domains from resolving. Here is a guide to block domains in Bind DNS server. To get all the IP addresses there is no way. What you can do is, install dig. It’s available in linux but not in windows. Then time to time enter dig youtube.com. It’ll show you … Read more
C++ Singleton design pattern
In 2008 I provided a C++98 implementation of the Singleton design pattern that is lazy-evaluated, guaranteed-destruction, not-technically-thread-safe:Can any one provide me a sample of Singleton in c++? Here is an updated C++11 implementation of the Singleton design pattern that is lazy-evaluated, correctly-destroyed, and thread-safe. See this article about when to use a singleton: (not often)Singleton: How … Read more