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What is the Swift equivalent of isEqualToString in Objective-C?
... But, unless I'm missing something, it doesn't seem you can test the identity between Strings: 'String' does not conform to protocol 'AnyObject'.
– user1040049
May 25 '15 at 16:45
...
Possibility of duplicate Mongo ObjectId's being generated in two different collections?
... design that relied on _id uniqueness across collections.
One can easily test this in the mongo shell:
MongoDB shell version: 1.6.5
connecting to: test
> db.foo.insert({_id: 'abc'})
> db.bar.insert({_id: 'abc'})
> db.foo.find({_id: 'abc'})
{ "_id" : "abc" }
> db.bar.find({_id: 'abc'})...
What is the best regular expression to check if a string is a valid URL?
...script: alert('blah'). You need to do further validation on Uri.Scheme to confirm the http/https/ftp protocol is being used, otherwise if such a URL is inserted into your ASP.NET pages' HTML as a link, your users are vulnerable to XSS attacks.
– Yoshi
Aug 10 '...
base64 encoded images in email signatures
... may be the more widely supported solution, but the only way to know is to test several major email clients with different security settings applied. Further complicating the matter is that you can receive email both on the web and in a variety of clients. For example, Gmail may behave differently w...
Use email address as primary key?
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@Vincent Malgrat: thanks for confirming that you have indeed misunderstood the concept of normalization. "you should not have the same information repeated on multiple rows" -- did you really mean to say "information"?! A compound key will usually involv...
What is the “main file” property when doing bower init?
... "CNAME",
"composer.json",
"CONTRIBUTING.md",
"docs",
"js/tests"
],
"dependencies": {
"jquery": ">= 1.9.0"
}
}
When I build in Brunch, it pulls these files from my bower_components folder in my public folder.
...
Use numpy array in shared memory for multiprocessing
...mport SharedArray as sa
# Create an array in shared memory
a = sa.create("test1", 10)
# Attach it as a different array. This can be done from another
# python interpreter as long as it runs on the same computer.
b = sa.attach("test1")
# See how they are actually sharing the same memory block
a[0]...
What is the exact meaning of IFS=$'\n'?
...
ANSI C-quoted strings is a key point. Thanks to @mklement0 .
You can test ANSI C-quoted strings with command od.
echo -n $'\n' | od -c
echo -n '\n' | od -c
echo -n $"\n" | od -c
echo -n "\n" | od -c
Outputs:
0000000 \n
0000001
0000000 \ n
0000002
0000000 \ n
0000002
000...
What is ?= in Makefile
... not set/doesn't have a value.
For example:
KDIR ?= "foo"
KDIR ?= "bar"
test:
echo $(KDIR)
Would print "foo"
GNU manual: http://www.gnu.org/software/make/manual/html_node/Setting.html
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Importing CSV with line breaks in Excel 2007
...
I can confirm that this works, you can even paste more data in different sheets without repeating the "text to columns" command. This is useful if you need to import several files.
– Alex
Feb ...