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Function to return only alpha-numeric characters from string?
...restricted to just A-Z.
Try this to remove everything except a-z, A-Z and 0-9:
$result = preg_replace("/[^a-zA-Z0-9]+/", "", $s);
If your definition of alphanumeric includes letters in foreign languages and obsolete scripts then you will need to use the Unicode character classes.
Try this to le...
Alter MySQL table to add comments on columns
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answered Jan 29 '10 at 14:18
RufinusRufinus
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What is an .axd file?
...source.axd
– Kiquenet
Nov 4 '15 at 10:22
add a comment
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How do you print in a Go test using the “testing” package?
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edited Dec 27 '19 at 0:44
Pang
8,2181717 gold badges7373 silver badges111111 bronze badges
answered...
return query based on date
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440
You probably want to make a range query, for example, all items created after a given date:
db....
How do I convert a PDF document to a preview image in PHP? [closed]
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10 Answers
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How to get a index value from foreach loop in jstl
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edited Jun 4 '14 at 20:55
Paul Gray
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answered Sep 1...
How to get the caret column (not pixels) position in a textarea, in characters, from the start?
...return node.selectionStart;
} else if (!document.selection) {
return 0;
}
var c = "\001",
sel = document.selection.createRange(),
dul = sel.duplicate(),
len = 0;
dul.moveToElementText(node);
sel.text = c;
len = dul.text.indexOf(c);
sel.moveStart('character',-1);...
Length of generator output [duplicate]
...f you have a lazy infinite generator? For example:
def fib():
a, b = 0, 1
while True:
a, b = b, a + b
yield a
This never terminates but will generate the Fibonacci numbers. You can get as many Fibonacci numbers as you want by calling next().
If you really need to know t...
Plot a bar using matplotlib using a dictionary
...ort matplotlib.pyplot as plt
D = {u'Label1':26, u'Label2': 17, u'Label3':30}
plt.bar(range(len(D)), list(D.values()), align='center')
plt.xticks(range(len(D)), list(D.keys()))
# # for python 2.x:
# plt.bar(range(len(D)), D.values(), align='center') # python 2.x
# plt.xticks(range(len(D)), D.keys(...