Alignment in golang

Alignment in golang

Content Index :

Alignment in golang
Tag : go , By : alchemist
Date : November 28 2020, 04:01 AM

I wish did fix the issue. I am implementing a network packet in golang. It was already implemented in C++. The purpose is to make the golang implemented client communicate with C++ implemented server. , According to Adrian and Volker's comment,
Q1: No
func PutUVarint
func PutUint32(b []byte, v uint32) {
    _ = b[3] // early check
    b[0] = byte(v)
    b[1] = byte(v >> 8)
    b[2] = byte(v >> 16)
    b[3] = byte(v >> 24)
} // assume it's littleEndian

// to store packet length into buffer.
PutUint32(buffer, pkt.length)

No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

what is byte alignment (cache line alignment) for Core Animation? Why it matters?

Tag : ios , By : mckasty
Date : March 29 2020, 07:55 AM
may help you . When the CPU copies something from memory into the CPU cache it does so in chunks. Those chunks are cache lines and they are of a fixed size. When data is stored in the CPU cache, it's store as lines. Making your data fit into the cache line size for your target architecture can be important for performance because it affects data locality.
ARMv7 uses 32 byte cache lines (like PowerPC). The A9 processor uses 64 byte cache lines. Because of this, you will see the most benefit by rendering into a rectangle that is on a 64 byte boundary and has dimensions that are a multiple of 64 bytes.

Set JTable header horizontal alignment based on value renderer column alignment

Tag : java , By : Priyatna Harun
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Here is an example of a custom header renderer that simply makes the text of the selected column Bold:
class MyTableHeaderRenderer implements TableCellRenderer
    private TableCellRenderer tableCellRenderer;

    public MyTableHeaderRenderer(TableCellRenderer tableCellRenderer)
        this.tableCellRenderer = tableCellRenderer;

    public Component getTableCellRendererComponent(JTable table, Object value,
        boolean isSelected, boolean hasFocus, int row, int column)
        Component c = tableCellRenderer.getTableCellRendererComponent(
            table, value, isSelected, hasFocus, row, column);

        if (column == table.getSelectedColumn())

        return c;
JTableHeader header = table.getTableHeader();
DefaultTableCellRenderer defaultRenderer = (DefaultTableCellRenderer)header.getDefaultRenderer();
header.setDefaultRenderer( new MyTableHeaderRenderer(defaultRenderer) );
TableCellRenderer tcr = table.getCellRenderer(0, column);
Component renderer = table.prepareRenderer(tcr, 0, column);
defaultRenderer.setAlignment( renderer.getAlignment() ); // whatever the alignment method is.

Biopython: Local alignment between DNA sequences doesn't find optimal alignment

Tag : development , By : drbillll
Date : March 29 2020, 07:55 AM
This might help you This seems to be a bug in the current implementation of local alignments in Biopython's pairwise2 module. There is a recent pull request (#782) on Biopython's GitHub, which should solve your problem:
>>> from Bio import pairwise2  # This is the version from the pull request
>>> seq1 = 'GTGGTCCTAGGC'
>>> seq2 = 'GCCTAGGACCAC'
>>> for a in pairwise2.align.localms(seq1, seq2, 1, -2, -2, 0):
        print pairwise2.format_alignment(*a)


Optimising datastructure/word alignment padding in golang

Tag : go , By : leorick
Date : March 29 2020, 07:55 AM
wish helps you Currently there's no compile-time optimisation; the values are padded to 8 bytes on x64.
You can manually arrange structs to optimally utilise space; typically by going from larger types to smaller; 8 consecutive byte fields for example, will only use 8 bytes, but a single byte would be padded to an 8 byte alignment, consider this: https://play.golang.org/p/0qsgpuAHHp
package main

import (

type Compact struct {
    a, b                   uint64
    c, d, e, f, g, h, i, j byte

// Larger memory footprint than "Compact" - but less fields!
type Inefficient struct {
    a uint64
    b byte
    c uint64
    d byte

func main() {
    newCompact := new(Compact)
    newInefficient := new(Inefficient)

Sequence alignment of multiple slices of ints in golang

Tag : arrays , By : user143038
Date : March 29 2020, 07:55 AM
hope this fix your issue It depends on what your "cost" function is, where your goal is to minimize your "cost".
A cost function could be something like this. The idea is that a "mismatch" is more costly than if there isn't anything to match, which we'll call "overruns" (say twice as costly). Take the number of cases where a[i] != b[i + offset] for a and b equal to s1,s2,s3,s4 and double it. Then add to that the absolute value of each offset for each pairing (in this case 6 pairings for 4 arrays) for the number of overruns at the beginning. Then add onto that the overruns at the end.
func cost(sn [][]int16, offsets [][]int) int {
  // cost accumulator
  c := 0.0

  // the factor of how much more costly a mismatch is than an overrun
  mismatchFactor := 2.0

  // define what you want, but here is an example of what I said above
  for i1:=0;i1<len(sn);i++ {
    for i2:=i1+1;i2<len(sn);i2++ {
      c += mismatchFactor * diff(sn[i1], sn[i2], offsets[i1][i2])
      c += math.Abs(offsets[i1][i2])
      c += math.Abs(len(sn[i1]) + offsets[i1][i2] - len(sn[i2]))

// offset of the offset of s1 wrt s2
func diff(s1 []int16, s2 []int16, offset int) int {
  // index, index, diff total
  i1,i2,d := 0,0,0
  if offset >= 0 {
    i1 += offset
  } else {
    i2 -= offset
  while i1<len(s1) && i2<len(s2) {
    if s1[i1] != s2[i2] {
  return d
Related Posts Related QUESTIONS :
  • How to publish to pubsub with Service Account Key JSON vs Service Account JSON
  • Issue in Go with appending to []byte, writing to file, and reading it
  • re-slicing 2d slice in go
  • Is it posible to configure Go Task runner to use fileextension yaml?
  • package level collection
  • Cast Method with return value to a method with interface{}
  • nginx 502 errors consistently with no application errors
  • Golang OpenGL line being drawn on Linux but not on Windows10
  • How do I run another executable from a Windows service
  • Make fmt.sprintf not to replace %s in variables
  • Go package selector based on condition
  • compile a go source file programmatically
  • What is the proper style and usage of golang Context?
  • golang find first element smaller or equal to given element using sort.Search
  • deadlock in golang
  • Unable to unmarshal AWS SQS message in GO
  • When does a channel block a goroutine
  • Why code in loop not executed when I have two go-routines
  • Read uint8 from []byte without creating a bytes.Buffer
  • Args and passing args from position[1] (not position 0)
  • How to keep single AWS S3 session in app?
  • How to convert int16 to hex-encoded string in Golang
  • Not able to encrypt using public key in golang
  • Go 1.12 modules: local import in non-local import
  • How to set a constant to negative value in Go
  • how to add new currency support to golang.org/x/text/currency
  • HTTP PUT request handler using go
  • How to defer an anonymous function returned by a function
  • Correct way of handling an error when implementing Less()
  • golang time.Format() gives different results for the same unix timestamp
  • How to make a function received different type as a string
  • How to compile a golang program within the golang code?
  • Find location of Golang application
  • Created a type alias for big.Int - but I can't Set it using its pointer receiver?
  • Should a developer commit Go generated code?
  • Go atomic store followed by atomic load is behaving erratically across routines
  • Two go files having package declaration main inside a package
  • Will go get command update the package in my local machine
  • Is the following implementation making my code parallel?
  • Is it possible to┬ácompile go code without builtin library that can run on a machine without operating system
  • Can I use an pointer to "error" to catch the return error?
  • Constant global user type values in Go
  • shouldn't unreachable code after os.Exit be flagged
  • How expensive is os.Getenv?
  • Conditional (Dynamic) Struct Tags
  • How to get info about last called func in Go?
  • Golang not incrementing by 0.1
  • How to set unique at struct Beego
  • How to use go importer
  • Output from benchmem
  • Generic panic recovering in go programs
  • Should database connections be opened and closed in every CRUD method?
  • Migrating your App Engine app from Go 1.9 to Go 1.11
  • How can I get the user's AppData folder path with golang?
  • Does delve support hot swapping of changes or some variant?
  • Address of Function Receiver Varies Between Methods
  • How to parse variable depth arrays into a struct from JSON
  • Building a small Go program for MIPS with no hardware floating point (softfloat required)
  • Go Interface property is undefined
  • Same package name on different files
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com