Most voted "immutability" questions
Immutability is the inability to modify data after it has been created. Modifications are made by copying data. The immutable data property is that it is *referentially transparent*.
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76
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answers5608
viewsWhat does "immutable" really mean?
In that question I did about value types and reference types in C#, it was quoted in the accepted answer that instances of structs must be immutable objects. Reading on wikipedia confirmed that an…
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answer1626
viewsWhat is Flyweight Pattern?
Researching a little to better understand the logic that leads strings in Java to be immutable, I found out that "internment" of Strings is an example of the pattern Flyweight. In accordance with…
pattern-design software-engineering memory-management immutability flyweightasked 7 years, 7 months ago Anthony Accioly 20,516 -
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answer1022
viewsThe use of immutability
Immutability What are the advantages and benefits, when to use and why to use immutability in my projects? The complexity of the implementation x time, worth it? When I should not use immutability…
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viewsHow to create an immutable object in Javascript?
I know it is possible to "freeze" a Javascript object through the method Object.freeze: var x = { foo:"bar", complexo:[1,2,3] }; Object.freeze(x); x.foo = "baz"; // Não tem efeito…
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answer443
viewsIs an immutable Enummap thread safe?
An immutable map built on top of a EnumMap could be used in multi-thread environment or there is some risk of competition problems? public enum MyEnum { VALUE1, VALUE2, VALUE3, VALUE4; } private…
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answer4428
viewsWhat’s the difference in Kotlin between var and val?
Learning Kotlin I came across the following doubt, according to the documentation: Classes in Kotlin can have properties. These can be declared as mutable, using the var keyword or read-only using…
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viewsIf Python strings are immutable, how can we change them with the replace() method?
If Python strings are immutable, how can we change them with the method replace(), for example? Ex: s = "banana" s = s.replace("b", "z") print(s) # zanana Is this a change of the original string or…
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answers1117
viewsHow do I return a new instance of the python class itself dynamically inside it?
I’m giving a study in Python and for this I am building a class in Python that I had already done in PHP. For example, in a given method in PHP I needed to return the same instance of the class,…
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answer93
viewsWhat exactly is the Datetime::createFromImmutable() method for?
What exactly is the method for DateTime::createFromImmutable()? Implemented according to the release note of version 7.3.0 of PHP.
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answer89
viewsIs it possible to apply or simulate immutability to an "object" of the Map type in Javascript?
For objects, we can leave it unchanged, so trying to re-assign a new value to a property, adding new properties, or removing properties is not possible. Of course, in case the object suffered…
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viewsWhat are the differences between constants declared with const and immutable variables declared with Let in Rust?
The declaration of immutable variables In Rust if you want to declare a variable, we use the keyword let. Example: fn main() { let site_name = "Stack Overflow em Português";…
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viewsWhy is it possible to change constant values in Javascript arrays?
Having the following code: const arr = [1,2,3]; console.log(arr); arr.push(4); console.log(arr); arr.pop(); console.log(arr); arr shouldn’t it be constant? And therefore shouldn’t accept the method…
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viewsImmutability in the angular components
Hello, I am learning functional programming and would like to know how to apply the principle of immutability in the angular components. For example, in the case below I have a list of files that…
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answer3392
viewsAdding character to a string
Good person my doubt and the next, I have the following situation: i have the following variable >>> a = "EXAMPLE" Let’s assume I had to remove the letter "M" right string, in this case I…
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viewsMethods that return constant values in C and C++ even if they come from variables, is it possible?
In a series of optimizations in a code written in C++ adopted a class to store application parameterization data and some pseuconstants let’s say so. What actually happens is that when the…
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answer162
viewsStructure in "tree", how to iterate on it?
Look at the picture: I’m trying to clone a page using the concepts of immutable. Each page has some features and the feature I must prepare before saving the page in the state(state) is "localId" By…