The problems associated with magic 'numbers' described above are not limited to numerical types and the term is also applied to other data types where declaring a named constant would be more flexible and communicative. For example, if it is required to randomly shuffle the values in an array representing a standard pack of playing cardsthis pseudocode does the job using the Fisher—Yates shuffle algorithm: In the preceding example, 52 is a magic number.
It is also a good programming questions for freshers. This question was asked to me long back and didn't had any idea about how to approach this question without using temp or third variable, may be lack of knowledge on bitwise operators in Java or may be it didn't click at that time.
Given some time and trial error, I eventually come out with a solution with just arithmetic operator but interviewer was keep asking about other approaches of swapping two variables without using temp or third variable.
Personally, I liked this question and included in list of my programming interview question because of its simplicity and some logical work, it force you to do. When learned bit-wise operation in Java I eventually find another way of swapping two variables without third variable, which I am going to share with you guys.
Swapping two numbers without using temp variable in Java If you have ever heard this question, then you must be familiar with this approach of swapping numbers without using temp variable.
If you are hearing it first time, then try it yourself, its a good programming exercise for absolute first timer. By the way, here is the code example of swapping two numbers without using temp variable and using arithmetic operator in Java: XOR bitwise operator returns zero if both operand is same i.
By leveraging this property, we can swap two numbers in Java. Here is code example of swapping two numbers without using temp variable in Java using XOR bitwise operand: Here is the code example to swap tow number without using third variable with division and multiplication operators in Java: Its good to know multiple ways of swapping two variables without using temp or third variable to handle any follow-up question.
Swapping numbers using bitwise operator is the fastest among three, because it involves bitwise operation.
A nice trick to drive interview on your expert area.Simple Fortran IV program . Multiple data card input. This program has two input checks: one for a blank card to indicate end-of-data, and the other for a zero value within the input data.
Magic numbers are common in programs across many operating systems. Magic numbers implement strongly typed data and are a form of in-band signaling to the controlling program that reads the data type(s) at program run-time.
Many files have such constants that identify the contained data. Set the drawing transformation matrix for combined rotating and scaling.
This option sets a transformation matrix, for use by subsequent -draw or -transform options.. The matrix entries are entered as comma-separated numeric values either in quotes or without spaces.
/*A C program is executed as if it is a function called by the Operating System, the Operating System can and does pass parameters to the program. I'm trying to write a shell script that, when run, will set some environment variables that will stay set in the caller's shell.
setenv FOO foo in csh/tcsh, or export FOO=foo in sh/bash only se. Licenses. All Python releases are Open schwenkreis.comically, most, but not all, Python releases have also been GPL-compatible.
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