我必须在桌子内使用for循环制作菱形星号。 必须有＆＃34;空白＆＃34;在星号前后移动<td>个空格并使其看起来居中，因此它看起来像钻石。我怎么做？ （我在HTML代码中使用了PHP。）
没有<tr>和<td>标签的代码，它看起来像钻石，因为它是居中对齐的：
<center>
<?php
echo "<table border = 1>";
// loop for the pyramid
for($i = 1; $i <= 10; $i += 2) {
for($j = 1; $j <= $i; $j++) {
echo "* ";
}
echo "<br />";
}
// loop for the inverted pyramid, so it looks like a diamond
for($i = 7; $i >= 1; $i -= 2) {
for($j = 1; $j <= $i; $j++) {
echo "* ";
}
echo "<br />";
}
echo "</table>";
?>
</center>
包含<tr>和<td>代码的代码，需要＆＃34;空格＆＃34;因为它看起来像是中心对齐的：
<?php
echo "<table border = 1>";
// loop for the pyramid
echo "<tr>";
for($i = 1; $i <= 10; $i += 2) {
echo "<tr>";
for($j = 1; $j <= $i; $j++) {
echo "<td>* </td>";
}
echo "</tr>";
}
echo "</tr>";
// loop for the inverted pyramid, so it looks like a diamond
for($i = 7; $i >= 1; $i -= 2) {
echo "<tr>";
for($j = 1; $j <= $i; $j++) {
echo "<td>* </td>";
}
echo "<br />";
echo "</tr>";
}
echo "</table>";
?>
请帮忙！
答案 0 :(得分：4)
这是您的解决方案的新代码。我添加了逻辑，将空白td向前和向后放到*
$connectDb = $services->get('connectDb');
$connectOAuth2 = $services->get('connectoauth2'); // --> service is not found
$service = new \ConnectApp\Service\UserEducation($connectDb, $connectOAuth2);
return new UserEducationResource($service);
答案 1 :(得分：1)
我使用下面的代码而不使用表格来制作菱形。
<div style="text-align: center">
<?php
$n = 8;
if($n === 1){ die("input must be greater than 1"); }
$nn = ($n * 2);
$m = (ceil($nn / 2) + 1);
$temp = 0;
for($x = 1; $x <= $nn; $x++){
$temp = (($x < $m) ? ($temp + 1) : ($temp - 1));
$total = ($temp > 1 ? ((2 * $temp) - 1) : $temp);
echo nl2br(str_repeat('* ', $total) . "\r\n");
}
?>
答案 2 :(得分：0)
我使用了下面的代码。
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
~/env/lib/python3.5/site-packages/dask/dataframe/utils.py in raise_on_meta_error(funcname, udf)
159 try:
--> 160 yield
161 except Exception as e:
~/env/lib/python3.5/site-packages/dask/dataframe/core.py in elemwise(op, *args, **kwargs)
3426 with raise_on_meta_error(funcname(op)):
-> 3427 meta = partial_by_order(*parts, function=op, other=other)
3428
~/env/lib/python3.5/site-packages/dask/utils.py in partial_by_order(*args, **kwargs)
903 args2.insert(i, arg)
--> 904 return function(*args2, **kwargs)
905
~/env/lib/python3.5/site-packages/pandas/core/ops.py in f(self, other)
2090
-> 2091 other = _align_method_FRAME(self, other, axis=None)
2092
~/env/lib/python3.5/site-packages/pandas/core/ops.py in _align_method_FRAME(left, right, axis)
1984 # GH17901
-> 1985 right = to_series(right)
1986
~/env/lib/python3.5/site-packages/pandas/core/ops.py in to_series(right)
1946 raise ValueError(msg.format(req_len=len(left.columns),
-> 1947 given_len=len(right)))
1948 right = left._constructor_sliced(right, index=left.columns)
ValueError: Unable to coerce to Series, length must be 3: given 4
During handling of the above exception, another exception occurred:
ValueError Traceback (most recent call last)
<ipython-input-5-ce21a4e5e37e> in <module>
1 my_var = [2,'wew','ewwew','44']
----> 2 [ k for k,v in locals().items() if v == my_var][0]
<ipython-input-5-ce21a4e5e37e> in <listcomp>(.0)
1 my_var = [2,'wew','ewwew','44']
----> 2 [ k for k,v in locals().items() if v == my_var][0]
~/env/lib/python3.5/site-packages/dask/dataframe/core.py in <lambda>(self, other)
1199 return lambda self, other: elemwise(op, other, self)
1200 else:
-> 1201 return lambda self, other: elemwise(op, self, other)
1202
1203 def rolling(self, window, min_periods=None, freq=None, center=False,
~/env/lib/python3.5/site-packages/dask/dataframe/core.py in elemwise(op, *args, **kwargs)
3425 else d._meta_nonempty for d in dasks]
3426 with raise_on_meta_error(funcname(op)):
-> 3427 meta = partial_by_order(*parts, function=op, other=other)
3428
3429 result = new_dd_object(graph, _name, meta, divisions)
/usr/lib/python3.5/contextlib.py in __exit__(self, type, value, traceback)
75 value = type()
76 try:
---> 77 self.gen.throw(type, value, traceback)
78 raise RuntimeError("generator didn't stop after throw()")
79 except StopIteration as exc:
~/env/lib/python3.5/site-packages/dask/dataframe/utils.py in raise_on_meta_error(funcname, udf)
175 "{2}")
176 msg = msg.format(" in `{0}`".format(funcname) if funcname else "", repr(e), tb)
--> 177 raise ValueError(msg)
178
179
ValueError: Metadata inference failed in `eq`.
Original error is below:
------------------------
ValueError('Unable to coerce to Series, length must be 3: given 4',)
Traceback:
---------
File "/home/michael/env/lib/python3.5/site-packages/dask/dataframe/utils.py", line 160, in raise_on_meta_error
yield
File "/home/michael/env/lib/python3.5/site-packages/dask/dataframe/core.py", line 3427, in elemwise
meta = partial_by_order(*parts, function=op, other=other)
File "/home/michael/env/lib/python3.5/site-packages/dask/utils.py", line 904, in partial_by_order
return function(*args2, **kwargs)
File "/home/michael/env/lib/python3.5/site-packages/pandas/core/ops.py", line 2091, in f
other = _align_method_FRAME(self, other, axis=None)
File "/home/michael/env/lib/python3.5/site-packages/pandas/core/ops.py", line 1985, in _align_method_FRAME
right = to_series(right)
File "/home/michael/env/lib/python3.5/site-packages/pandas/core/ops.py", line 1947, in to_series
given_len=len(right)))
答案 3 :(得分：-1)
<?php
for($i=0;$i<=5;$i++){
for($j=5;$j>=$i;$j--){
echo ' ';
}
for($k=0;$k<=$i;$k++){
echo '*';
}
echo '<br />';
}
for($i=0;$i<=4;$i++){
for($k=0;$k<=$i+1;$k++){
echo ' ';
}
for($j=4;$j>=$i;$j--){
echo '*';
}
echo '<br />';
}
?>