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What's the difference between ConcurrentHashMap and Collections.synchronizedMap(Map)?
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Please also note that the ConcurrentHashMap does not allow null keys or values. So they are NOT equal alternatives of a synchronized map.
– onejigtwojig
Oct 20 '11 at 19:42
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How to create an HTML button that acts like a link?
...analogous with the <a> element, but unfortunately no, this attribute does not exist according to HTML specification.
CSS
If CSS is allowed, simply use an <a> which you style to look like a button using among others the appearance property (it's only not supported in Internet Explorer)...
Different bash prompt for different vi editing mode?
...mpt that depends on the mode you are currently in (insert or command). How does one find out this editing mode?
8 Answers
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Why does a RegExp with global flag give wrong results?
...r'));
alert(re.lastIndex);
result.push(re.test('Foo Bar'));
If you don't want to manually reset lastIndex to 0 after every test, just remove the g flag.
Here's the algorithm that the specs dictate (section 15.10.6.2):
RegExp.prototype.exec(string)
Performs
a regular expression match of stri...
Multiple INSERT statements vs. single INSERT with multiple VALUES
...Addition: SQL Server 2012 shows some improved performance in this area but doesn't seem to tackle the specific issues noted below. This
should apparently be fixed in the next major version after
SQL Server 2012!
Your plan shows the single inserts are using parameterised procedures (possibly au...
Create MSI or setup project with Visual Studio 2012
...s better. If you did a survey you would see that
nobody is using ISLE. I don't know why you guys continue to associate
with InstallShield. It damages your credibility. Any developer worth
half his weight in salt knows ISLE is worthless and when you stand
behind it we have to question Microso...
Django rest framework nested self-referential objects
...s you should take a look at the customising the default fields part of the docs. You can't currently directly declare a serializer as a field on itself, but you can use these methods to override what fields are used by default.
class CategorySerializer(serializers.ModelSerializer):
parentCateg...
Build fat static library (device + simulator) using Xcode and SDK 4+
...ith a project-embedded-in-another-project (although I highly recommend NOT doing that, ever - Apple has a couple of show-stopper bugs in Xcode if you embed projects inside each other, from Xcode 3.x through to Xcode 4.6.x)
Bonus script to let you auto-include Bundles (i.e. include PNG files, PLIST f...
How can I have a newline in a string in sh?
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\\ backslash
\' single quote
\" double quote
\nnn the eight-bit character whose value is the octal value
nnn (one to three digits)
\xHH the eight-bit character whose value is the hexadecimal
va...
How to pass all arguments passed to my bash script to a function of mine? [duplicate]
... an example.
abc "$@"
When using $@, you should (almost) always put it in double-quotes to avoid misparsing of arguments containing spaces or wildcards (see below). This works for multiple arguments. It is also portable to all POSIX-compliant shells.
It is also worth nothing that $0 (generally the...