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+# Notes on go
+
+**Type assertion**
diff --git a/.trash/daily/23-Jun-2025.md b/.trash/daily/23-Jun-2025.md
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diff --git a/Item Size Position.md b/Item Size Position.md
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+[[Quickshell]]
+
+---
+
+# Item Size Position
+
+`Item` type is the base type for "visual items". It has two properties:
+- actual size ( width, height )
+- implicit/desired size ( implicitWidth, implicitHeight )
+
+Implicit size is used by containers to determine their own.
+
+## Container items
+
+Container (ie. `Item`):
+```qml
+implicitWidth: child.implicitWidth + margin * 2
+implicitHeight: child.implicitHeight + margin * 2
+```
+
+^ `WrapperItem` does this margin for us.
+
+Child (ie. `Rectangle`):
+```qml
+x: parent.margin
+y: parent.margin
+width: parent.width - parent.margin * 2
+height: parent.height - parent.margin * 2
+implicitWidth: 50
+implicitHeight: 50
+```
+[Binding](https://doc.qt.io/qt-6/qml-qtqml-binding.html) can be used to map any property
+[Anchors](https://doc.qt.io/qt-6/qtquick-positioning-anchors.html) are a shorthand way to achieve many common position and size bindings.
+
+Using a containers' Item.childrenRect to determine size of children is a mistake.
+Item.childrenRect represents the actual geometry of all child items, not the mplicit one.
+
+Use [MarginWrapperManager](https://quickshell.org/docs/types/Quickshell.Widgets/MarginWrapperManager) to handle size and position of container and a single child item.
+
+## Layouts
diff --git a/Protocol Buffers - protobuf.dev.md b/Protocol Buffers - protobuf.dev.md
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+Protocol buffer messages are often loaded in to memory completely. So large data is not a good fit. Usually not more than a few MBs.
+
+The same data can have many different forms of binary serialization when it is serialized, therefore serialized data (messages) cannot be compared.
+
+Messages are not compressed. They can be compresses with zip/gzip but to obtain maximum compression use specialized compression algorithms such as ones used by JPEG/PNG.
+
+Protocol buffers are not maximally efficient for large multi-dimensional arrays or floating point numbers.
+
+Not well supported in non-object oriented languages.
+
+Protocol buffer messages require their schema to be interpreted correctly.
+
+
+---
+
+# Workflow
+1. Write .proto schema
+2. Generate code using `protoc` compiler
+3. Compile generated protobuf code together with project
+4. Use Protobuff classes to serialize, share and deserialize data
+\ No newline at end of file
diff --git a/Quickshell.md b/Quickshell.md
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+[[Item Size Position]]
+
+---
+
+# Quickshell
+
+https://quickshell.org
+
+XDG standard config paths. Looks for `shell.qml` in all sub-directories unless root dir has one. Target specific config using `quickshell -c configname`.
+
+## Windows
+Requires `import Quickshell`.
+Types:
+- PanelWindow: for bars, widgets and overlays
+- FloatingWindow: standard desktop windows
+
+[Type reference](https://quickshell.org/docs/types/Quickshell/PanelWindow)
+
+## Text
+[Text](https://doc.qt.io/qt-6/qml-qtquick-text.html) requires `import QtQuick.
+Set `id: somename` to reference by `somename`, ie `somename.text = "blaat"`
+
+Strings can be concat using `+`
+## Processes
+Requires `import Quickshell.Io` (NOTE the capital I in Io)
+
+[Process](https://quickshell.org/docs/types/quickshell.io/process) object runs commands.
+[StdioCollector](https://quickshell.org/docs/types/Quickshell.Io/StdioCollector) reads process' output.
+
+Use a [Timer](https://doc.qt.io/qt-6/qml-qtqml-timer.html) to run Process on an interval.
+
+## Component
+A reusable tree of objects.
+[Variants](https://quickshell.org/docs/types/Quickshell/Variants) creates instances of a component based on user supplied data. For example this used to create instances of a window based on the monitor list.
+
+To prevent many of the same processes when we reuse a component many times use `Scope` to move them outside of the reused component.
+We can use a [Property Definition](https://quickshell.org/docs/configuration/qml-overview/#property-definitions) on the parent scope to communicate between components in different scopes but in the same parent scope. Properties are reactive.
+
+## Objects
+Properties
+
+`[required] [readonly] [default] property <type> <name>[: binding]`
+
+`id` is a special property that can be used to reference an object throughout the entire current file. Has to be lowercase.
+
+
+Functions
+
+```qml
+function <name>(<paramname>[: <type>][, ...])[: returntype] {
+  // multiline expression (note that `return` is required)
+}
+```
+
+Can be invoked in expressions, reactivity is carried through -- so
+if the argument value changes all expressions are re-evaluated.
+
+Lambas `() => ...` 
+
+
+## Multiple files
+shell.qml is the root. If a filename starts with a capital letter it can be referenced. E.g Bar.qml
+```qml
+Scope {
+	Bar {}
+}
+```
+
+Other folders can be imported using `import` statements.
+
+## Singleton
+Has only one instance that is accessible from every scope. For example the date process in the bar.
+
+Set `pragma Singleton` at the top of the file ( before imports ). and Use `Singleton` type.
+
+
+[Clock formatting](https://doc.qt.io/qt-6/qml-qtqml-qt.html#formatDateTime-method)
+
+
+## Signals
+Event emitter.
+Same rules as properties and function.
+
+`signal <name>(<paramname>: <type>[, ...])`
+
+Objects have implict `on<Signal>` (note capital S) for each signal defined.
+
+Connections object can be used to access difficult to reach signal handlers,
+such as those from Singletons.
+
+`Connections { target: id; function onClicked() # example target: button }`
+Does that somehow override the onClicked function of the target??
+
+
+All properties have `propertynameChanged` handler, powering the reactivity.
+
+
+## Attached objects
+Every object has `Component` attached, used to run stuff when an Object finishes
+initializes using `Component.onCompleted`.
+
diff --git a/The Go Programming Language - A Donovan, B Kernighan - 2015.md b/The Go Programming Language - A Donovan, B Kernighan - 2015.md
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+Go compiles into native machine code.
+Go handles Unicode natively thus any character can be used in a string.
+Divided into packages, where a package is sort of a library, except for main which defines an executable.
+Import declarations **must** follow the package declaration.
+Function declarations: `func <name> (<param list>) (<result list>)`. No semicolons, unless multiple statements on 1 line.
+`gofmt` mandatory. `goimports` (`golang.org/x/tools/cmd/goimports`) manages imports.
+Slices are dynamically sized arrays that can be accessed `s[i]` or a subset can be taken `s[i:j]`. Indexing: half-open (starts at 0). `s[i:j]` yields  i through j-1. Either can be omitted.
+
+Convention: comment describing package preceding package declaration.
+
+Variables initialised to "zero value".7689
+String concatenation via `+` char.
+Supports assignment operators, e.g `+=`, `*=` etc
+Short-hand variable declaration requires no type, it is inferred of the value `:=` **only allowed in a function**
+
+For-loop structure:
+```
+for initialization; condition; post {
+	// code
+}
+```
+Either part can be left away with different semantics. 
+All parts gone: loop forever.
+Only condition is like a while x == true;
+`range` keyword to loop over a slice or array with `for index, arg := range slice`
+
+`_` is the blank identifier, thus above if we don' need the index we can put `_`.