variable-assignment

I've noticed that a common pattern I use is to assign SomeClass.__init__() arguments to self attributes of the same name. Example: class SomeClass(): def __init__(self, a, b, c): self.a = a self.b = b self.c = c In fact it must be a common task for others as well as PyDev has a shortcut for this - if you place the cursor on the parameter list and click Ctrl+1 you're given the option to Assign parameters to attributes which will create that boilerplate code for you. Is there a different, short and elegant way to perform this assignment? I sympathize with your sense that boilerplate code is a

This question is related to this question , but not quite the same. Say I have this data frame, df <- data.frame( id = c(1:6), profession = c(1, 5, 4, NA, 0, 5)) and a string with human readable information about the profession codes. Say, profession.code <- c( Optometrists=1, Accountants=2, Veterinarians=3, `Financial analysts`=4, Nurses=5) Now, I'm looking for the easiest way to replace the values in df$profession with the text found in profession.code . Preferably without use of special libraries, unless it shortens the code significantly. I would like my end result to be df <- data.frame(

I am new to Java and I have some questions in mind regarding object assignment. For instance, Test t1 = new Test(); Test t2 = t1; t1.i=1; Assuming variable i is defined inside Test class, am I right to assume both t1 and t2 point to the same object where the modification t1.i=1 affects both t1 and t2 ? Actually I tested it out and seems like I was right. However when I try the same thing on String , the modification happens only on one side where the other side is unaffected. What is the reason behind this? Edit: The case I tried with String. String s1 = "0"; String s2 = s1; s1 = "1"; System

This question already has an answer here: Copying nested lists in Python 3 answers How to clone or copy a list? 14 answers X is a 2D array. I want to have a new variable Y that which has the same value as the array X . Moreover, any further manipulations with Y should not influence the value of the X. It seems to me so natural to use y = x . But it does not work with arrays. If I do it this way and then changes y, the x will be changed too. I found out that the problem can be solved like that: y = x[:] But it does not work with 2D array. For example: x = [[1,2],[3,4]] y = x[:] y[0][0]= 1000

I am pulling varchar values out of a DB and want to set the string I am assigning them to as "" if they are null . I'm currently doing it like this: if (string.IsNullOrEmpty(planRec.approved_by) == true) this.approved_by = ""; else this.approved_by = planRec.approved_by.toString(); There seems like there should be a way to do this in a single line something like: this.approved_by = "" || planRec.approved_by.toString(); However I can't find an optimal way to do this. Is there a better way or is what I have the best way to do it? Try this: this.approved_by = IsNullOrEmpty(planRec.approved_by) ?

This question already has an answer here: Reference template variable within Jinja expression 1 answer I would like to know how can I set a variable with another variable in jinja. I will explain, I have got a submenu and I would like show which link is active. I tried this: {% set active_link = {{recordtype}} -%} where recordtype is a variable given for my template. {{ }} tells the template to print the value, this won't work in expressions like you're trying to do. Instead, use the {% set %} template tag and then assign the value the same way you would in normal python code. {% set testing =

Is it possible to declare a variable in Python, like so?: var so that it initialized to None? It seems like Python allows this, but as soon as you access it, it crashes. Is this possible? If not, why? EDIT: I want to do this for cases like this: value for index in sequence: if value == None and conditionMet: value = index break Duplicate Uninitialised value in python (by same author) Are there any declaration keywords in Python? (by the same author) Related Python: variable scope and function calls Other languages have "variables" Why not just do this: var = None Python is dynamic, so you don

I would like to do an update by doing a simple addition on Sequelize. table: id || data 1 || 10 sample: db.table.update({ data : 1 }, { where: { id: 1 }}); after this query id || data 1 || 11 I know it's a simple question, but I could not find the solution. Which operator can I add and subtract? Thank you Here it is : db.table.update({ field: Sequelize.literal('data + 1') }, { where: { id: 1 }})) OR User.findById(1).then(user => { // -----> First Way return user.increment('my-integer-field', {by: 2}); // -----> Second Way return user.increment([ 'my-integer-field', 'my-very-other-field' ], {by