Question

             {{ set userIds = {} }}
             {% for user in users %}
             ...
               {% set userIds = userIds|merge({id : user.id} %}
             ...
             {% endfor %}

如何访问代码中使用的任何foreach的$ loop？

Answer 1

您可以使用import numpy as np import matplotlib.pyplot as plt from scipy.spatial.distance import cdist # Mean M = [10, 7] # Covariance matrix V = np.array([[ 9, -2], [-2, 2]]) # Generate a sample from the multivariate normal distribution # with mean M and covariance matrix V. np.random.seed(314159) x = np.random.multivariate_normal(M, V, size=250) # Compute the Mahalanobis distance of each point in the sample. mdist = cdist(x, [M], metric='mahalanobis', V=V)[:,0] # Find where the Mahalanobis distance is less than 2. d2_mask = mdist < 2 x2 = x[d2_mask] plt.plot(x2[:,0], x2[:,1], 'o', markeredgecolor='r', markerfacecolor='w', markersize=6, alpha=0.6) plt.plot(x[:,0], x[:,1], 'k.', markersize=5, alpha=0.5) plt.grid(alpha=0.3) plt.axis('equal') plt.show()访问当前循环的父循环。

Answer 2

就我而言（Laravel 6.8）$loop->parent看起来像这样

[
{"iteration":1,"index":0,"remaining":1,"count":2,"first":true,"last":false,"odd":true,"even":false,"depth":1,"parent":null},
{"iteration":2,"index":1,"remaining":0,"count":2,"first":false,"last":true,"odd":false,"even":true,"depth":1,"parent":null}
]

访问父索引$loop->parent->index

如何在嵌套的foreach中访问$ loop变量

2 个答案: