ternary

Understanding ternary operators [closed]

由 妖精的绣舞 提交于 2019-12-04 23:23:25
This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center . Closed 7 years ago . I have the following code: c.m & 3 || (b |= 2, 65 <= a && 90 >= a ? a = 65 : 48 <= a && 57 >= a ? a = 48 : b & 1 ? 97 <= a && 122 >= a ? a = 65 : 197 == a || 229 == a ? b &= 5 : 192 <= a && 687 >= a ? a = 192 : 1536 <= a ? a = 1536 : 912 <= a ? a = 912 :

using PHP's null coalescing operator on an array

由 荒凉一梦 提交于 2019-12-04 06:02:16
问题 I am using PHP's null coalescing operator described by http://php.net/manual/en/migration70.new-features.php. Null coalescing operator ¶ The null coalescing operator (??) has been added as syntactic sugar for the common case of needing to use a ternary in conjunction with isset(). It returns its first operand if it exists and is not NULL; otherwise it returns its second operand. <?php // Fetches the value of $_GET['user'] and returns 'nobody' // if it does not exist. $username = $_GET['user']

ternary operator without else in C

由 可紊 提交于 2019-12-03 22:09:45
I want to use ternary operator without else in C. How do I do it. (a)? b: nothing; something like this. What do I use in nothing part? If you are using a ternary operator like that, presumably it could be replaced by: if (a) { b; } which is much, much better. (The intent is clearer, so the code is easier to read, and there will be no performance loss.) However, if you are using the ternary operator as an expression, i.e. printf("%d cat%s", number_of_cats, number_of_cats != 1 ? "s" : <nothing>); a = b*c + (d == 0 ? 1 : <nothing>); then the <nothing> value depends on the context it is being used

String concatenation does not work properly in Java when concatenating 2 results of ternary operators

由 拈花ヽ惹草 提交于 2019-12-03 21:53:24
问题 Dear Java guru 's! Can you, please, explain me, why String concatenation does not work properly in Java when concatenating 2 results of ternary operators? Example: String str = null; String x = str != null ? "A" : "B" + str == null ? "C" : "D"; System.out.println(x); Output is "D", but I expected "BC". I am suspecting that it works like so because of operators priorities, but I am not sure, about how we exactly we get "D" for case above. What calculation algorithm takes place for this case?

Multiple conditions in ternary operators

由 限于喜欢 提交于 2019-12-03 07:10:06
问题 First off, the question is "Write a Java program to find the smallest of three numbers using ternary operators." Here's my code: class questionNine { public static void main(String args[]) { int x = 1, y = 2, z = 3; int smallestNum; smallestNum = (x<y && x<z) ? x : (y<x && y<z) ? y : (z<y && z<x) ? z; System.out.println(smallestNum + " is the smallest of the three numbers."); } } I tried to use multiple conditions in the ternary operator but that doesn't work. I was absent a few days so I'm

C - Ternary operate to if else

由 那年仲夏 提交于 2019-12-02 23:51:54
问题 Can someone help me convert this line to an if-else statement? temp = head->left ? head->left : head->right; Thanks! 回答1: if ( head->left ) temp = head->left; else temp = head->right; 回答2: if (head->left) { temp = head->left; } else { temp = head->right; } 来源： https://stackoverflow.com/questions/22976190/c-ternary-operate-to-if-else

Operator precedence and ternary operator

由 ぃ、小莉子 提交于 2019-12-02 11:39:24
问题 I have a problem in C. #include<stdio.h> int main() { int a = 10, b = 0, c = 7; if (a ? b : c == 0) printf("1"); else if (c = c || a && b) printf("2"); return 0; } This code prints 2 but I think a?b:c returns b=0 and 0==0 returns 1. Can you explain the code? 回答1: Your conditions are not properly written. In the first if-statement: if (a ? b : c == 0) if you put the values, then it becomes if(10 ? 0 : 7 == 0) means, it will always return 0. That's why control goes to the else part and there,

Why break cannot be used with ternary operator?

由 空扰寡人 提交于 2019-12-02 11:26:15
问题 while(*p!='\0' && *q!='\0') { if(*p==*q) { p++; q++; c++; } else break; } I have written this using ternary operator but why its giving error for break statement? *p==*q?p++,q++,c++:break; gcc compiler gives this error: expected expression before ‘break’ 回答1: When you use a ternary operator, it is not like an if . The ternary operator has this form: (condition ? expression_if_true : expression_if_false); Those two expression must have the same type, otherwise that makes nonsense. And as Thilo

Operator precedence and ternary operator

由 狂风中的少年 提交于 2019-12-02 04:45:36
I have a problem in C. #include<stdio.h> int main() { int a = 10, b = 0, c = 7; if (a ? b : c == 0) printf("1"); else if (c = c || a && b) printf("2"); return 0; } This code prints 2 but I think a?b:c returns b=0 and 0==0 returns 1. Can you explain the code? Nishu Tayal Your conditions are not properly written. In the first if-statement: if (a ? b : c == 0) if you put the values, then it becomes if(10 ? 0 : 7 == 0) means, it will always return 0. That's why control goes to the else part and there, it becomes else if (7 = 7 || 10 && 0) since you used the "=" operator here (c = c), it will be

PHP, Shorthand, If..Else using Ternary Operators

由 独自空忆成欢 提交于 2019-12-01 22:42:20
Is there a oneliner for this? A nice Ternary OP? $F_NAME = $_SESSION['USR']['F_NAME']; if(isset($_POST['F_NAME'])) {$F_NAME = $_POST['F_NAME'];} Basically "If the POST is sent, show that, even if the post is empty, otherwise grab the value from the session, but only if the post was not set or empty" Really splitting hairs here... looking for something like this: $F_NAME = ? ($F_NAME ? isset($_POST['F_NAME']) : $_SESSION['USR']['F_NAME']); Its supposed to be: (conditions) ? true : false satisfies <--^ ^----> did not satisfy So this equates into: $F_NAME = isset($_POST['F_NAME']) ? $_POST['F
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