我正在尝试在我的网站上创建民意调查功能。如果用户按下按钮时尚未投票,我希望计数增加1;如果按下按钮时用户已经投票,我希望计数减少1。现在,它会上升到无穷远,永远不会达到-1。
如果我将if(voted)更改为if(!voted),则会出现相反的问题,并且每次单击都变为-1。
var voted = new Boolean(false);
$(document).ready(function () {
$("#container div button").click(function () {
if (voted) {
$(this).parent().animate({
width: '+=100px'
}, 500);
$(this).prev().html(parseInt($(this).prev().html()) + 1)
voted === true;
} else {
$(this).parent().animate({
width: '-=100px'
}, 500);
$(this).prev().html(parseInt($(this).prev().html()) - 1)
voted === false;
}
});
});
答案 0 :(得分:6)
voted === true
应该是voted = true
和
voted === false
应该是voted = false
您必须重新分配voted
变量,而不是检查是否相等。
看看assignment operator和equality operator在js中如何工作
答案 1 :(得分:0)
rotation_quat = Quaternion(0.999999913938509, 0.00029714546497339216, -0.00011465939948083866, 0.0002658585515330323)
rotation = rotation_quat.rotation_matrix.astype(np.float64)
translation = np.array([0.2,0.2,0.8]).astype(np.float64)
R1, R2, P1, P2, Q, roi1, roi2 = cv2.stereoRectify(intrinsicMatrix1, distCoeffs1, intrinsicMatrix2, distCoeffs2, img1.shape[::-1], rotation, translation, alpha=1)
map11, map12 = cv2.initUndistortRectifyMap(intrinsicMatrix1, distCoeffs1, R1, P1, img1.shape[::-1], cv2.CV_32FC1)
map21, map22 = cv2.initUndistortRectifyMap(intrinsicMatrix2, distCoeffs1, R2, P2, img2.shape[::-1], cv2.CV_32FC1)
# rectify
img1_rect = cv2.remap(img1, map11, map12, cv2.INTER_LANCZOS4)
img2_rect = cv2.remap(img2, map21, map22, cv2.INTER_LANCZOS4)
cv2.imshow("img1_rect", img1_rect)
cv2.waitKey(0)
cv2.imshow("img2_rect", img2_rect)
cv2.waitKey(0)
和voted === true
是比较。
您应该使用voted === false
和voted = true
(这是适当的分配)