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Select all contents of textbox when it receives focus (Vanilla JS or jQuery)
What is a Vanilla JS or jQuery solution that will select all of the contents of a textbox when the textbox receives focus?
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Sending websocket ping/pong frame from browser
...chrome related to ping-pong). Or is it just a design pattern (e.g. I literally send "ping" or any other string to the server and have it respond). Is ping-pong at all related to continuation frames?
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nodejs require inside TypeScript file
... of default definitions for window, document and such specified in a file called lib.d.ts. If I do a grep for require in this file I can find no definition of a function require. Hence, we have to tell the compiler ourselves that this function will exist at runtime using the declare syntax:
declare...
Where is the list of predefined Maven properties
I know there is a list of all predefined Maven properties (you know like project.build.sourceEncoding , or project.build.sourceDirectory ). I once saw the list but I just can't find it again.
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How to execute raw SQL in Flask-SQLAlchemy app
...ion.execute('SELECT * FROM my_table WHERE my_column = :val', {'val': 5})
All your application queries should be going through a session object, whether they're raw SQL or not. This ensures that the queries are properly managed by a transaction, which allows multiple queries in the same request to ...
What does the (unary) * operator do in this Ruby code?
...*[arg1, arg2, arg3]
It can also be used in a different context, to catch all remaining method arguments in a method definition. In that case, it does not expand, but combine:
def method2(*args) # args will hold Array of all arguments
end
Some more detailed information here.
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DROP IF EXISTS VS DROP?
...ent platforms might support it with different syntax, or not support it at all. In PostgreSQL, the syntax is
DROP TABLE IF EXISTS table_name;
The first one will throw an error if the table doesn't exist, or if other database objects depend on it. Most often, the other database objects will be fo...
How do I enable C++11 in gcc?
... program. Create a new file named Makefile (with a capital M). To automatically compile your code just type the make command in a terminal. You may have to install make.
Here's a simple one :
CXX=clang++
CXXFLAGS=-g -std=c++11 -Wall -pedantic
BIN=prog
SRC=$(wildcard *.cpp)
OBJ=$(SRC:%.cpp=%.o)
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What does the fpermissive flag do?
...formant code from errors to warnings.
Thus, using -fpermissive will allow some nonconforming code to compile.
Bottom line: don't use it unless you know what you are doing!
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ViewModel Best Practices
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I create what I call a "ViewModel" for each view. I put them in a folder called ViewModels in my MVC Web project. I name them after the controller and action (or view) they represent. So if I need to pass data to the SignUp view on the Member...