convert JSON Type to Byte array format in java
Get the bytes of the string: obj.toString().getBytes(theCharset);
byte
How many bits is a “word”?
I’m not familiar with either of these books, but the second is closer to current reality. The first may be discussing a specific processor. Processors have been made with quite a variety of word sizes, not always a multiple of 8. The 8086 and 8087 processors used 16 bit words, and it’s likely this is …
Converting a byte array into a hex string
As I am on Kotlin 1.3 you may also be interested in the UByte soon (note that it’s an experimental feature. See also Kotlin 1.3M1 and 1.3M2 announcement) E.g.: @ExperimentalUnsignedTypes // just to make it clear that the experimental unsigned types are used fun ByteArray.toHexString() = asUByteArray().joinToString(“”) { it.toString(16).padStart(2, ‘0’) } The formatting option is …
How many bytes will a string take up?
From my article on strings: In the current implementation at least, strings take up 20+(n/2)*4 bytes (rounding the value of n/2 down), where n is the number of characters in the string. The string type is unusual in that the size of the object itself varies. The only other classes which do this (as far …
convert Byte Array to Secret Key
You need to use the new keyword to call the constructor and create the object. SecretKey originalKey = new SecretKeySpec(encodedKey, 0, encodedKey.length, “AES”); When you try to call it without new, the compiler thinks it might be a method you’ve defined inside that class, hence your error message.
How to download Postgres bytea column as file
One simple option is to use COPY command with encode to hex format and then apply xxd shell command (with -p continuous hexdump style switch). For example let’s say I have jpg image in bytea column in samples table: \copy (SELECT encode(file, ‘hex’) FROM samples LIMIT 1) TO ‘/home/grzegorz/Desktop/image.hex’ $ xxd -p -r image.hex > …
How to get bytes of a String in Dart?
import ‘dart:convert’; String foo = ‘Hello world’; List<int> bytes = utf8.encode(foo); print(bytes); Output: [72, 101, 108, 108, 111, 32, 119, 111, 114, 108, 100] Also, if you want to convert back: String bar = utf8.decode(bytes);
Why does a byte only have 0 to 255?
Strictly speaking, the term “byte” can actually refer to a unit with other than 256 values. It’s just that that’s the almost universal size. From Wikipedia: Historically, a byte was the number of bits used to encode a single character of text in a computer and it is for this reason the basic addressable element …
How to declare and use 1D and 2D byte arrays in Verilog?
Verilog thinks in bits, so reg [7:0] a[0:3] will give you a 4×8 bit array (=4×1 byte array). You get the first byte out of this with a[0]. The third bit of the 2nd byte is a[1][2]. For a 2D array of bytes, first check your simulator/compiler. Older versions (pre ’01, I believe) won’t support …
Request returns bytes and I’m failing to decode them
Did you try to parse it with the json module? import json parsed = json.loads(response.content)