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HTML5 Email Validation
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edited Jan 4 '19 at 14:47
Nick Larsen
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How to check if a file exists in Go?
...eck if a file exists, equivalent to Python's if os.path.exists(filename):
Edited: per recent comments
if _, err := os.Stat("/path/to/whatever"); err == nil {
// path/to/whatever exists
} else if os.IsNotExist(err) {
// path/to/whatever does *not* exist
} else {
// Schrodinger: file may or ...
Why would one use nested classes in C++?
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edited Oct 14 '18 at 3:06
peterh - Reinstate Monica
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Shell script while read line loop stops after the first line
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edited Jul 19 '19 at 8:44
answered Mar 25 '19 at 9:32
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How to call C from Swift?
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edited May 23 '17 at 12:34
Community♦
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answered Jun 2 '14 at...
Importing a CSV file into a sqlite3 database table using Python
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edited May 26 at 0:35
answered May 22 '10 at 12:20
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What's the easiest way to escape HTML in Python?
...mp;lt;
> to >
& to &
That is enough for all HTML.
EDIT: If you have non-ascii chars you also want to escape, for inclusion in another encoded document that uses a different encoding, like Craig says, just use:
data.encode('ascii', 'xmlcharrefreplace')
Don't forget to deco...
How to manage client-side JavaScript dependencies? [closed]
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edited May 23 '17 at 10:31
Community♦
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answered Feb 20 '13 a...
Why is parenthesis in print voluntary in Python 2.7?
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edited Feb 28 '19 at 21:08
user2357112 supports Monica
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How do you query for “is not null” in Mongo?
... according to the docs, $exists currently can't use an index, but $ne can.
Edit: Adding some examples due to interest in this answer
Given these inserts:
db.test.insert({"num":1, "check":"check value"});
db.test.insert({"num":2, "check":null});
db.test.insert({"num":3});
This will return all three ...