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How to get a subset of a javascript object's properties
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While it's a bit more verbose, you can accomplish what everyone else was recommending underscore/lodash for 2 years ago, by using Array.prototype.reduce.
var subset = ['color', 'height'].reduce(function(o, k) { o[k] = elmo[k]; return o; ...
What does the ^ operator do in Java?
...= 110
------------------ xor
3 = 011
This the truth table for bitwise (JLS 15.22.1) and logical (JLS 15.22.2) xor:
^ | 0 1 ^ | F T
--+----- --+-----
0 | 0 1 F | F T
1 | 1 0 T | T F
More simply, you can also think of xor as "this or that, but not both!".
See also
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How to determine the encoding of text?
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Thanks for the chardet reference. Seems good, although a bit slow.
– Craig McQueen
Jan 28 '10 at 5:15
17
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How to create SBT project with IntelliJ Idea?
...for some time. Yes, it is going back to Emacs, but ENSIME turns it into a bit or an idea with refactoring, debugging support, navigation, etc. It's not nowhere near as good as Eclipse (Java), but unless the scala plugins work better it's the best we have.
Until the Scala development environments ...
How to set default value for form field in Symfony2?
...'); but this is called every time you load the entity (db or not) and is a bit messy. It does however work for every field type as you can create dates or whatever else you need.
If statements within get's
I wouldn't, but you could.
return ( ! $this->hasFoo() ) ? 'default' : $this->foo;
Fa...
copying all contents of folder to another folder using batch file?
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gunr2171
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answered Jan 5 '11 at 5:45
eHussaineHussain
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Can I access variables from another file?
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answered Jul 14 '10 at 8:18
Dagg NabbitDagg Nabbit
64.7k1717 gold badges9898 silver badges135135 bronze badges
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Cosmic Rays: what is the probability they will affect a program?
... increase risk since it would take less energy to change the state of each bit?
– Robert
Apr 5 '10 at 21:59
65
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How do you create a yes/no boolean field in SQL server?
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The equivalent is a BIT field.
In SQL you use 0 and 1 to set a bit field (just as a yes/no field in Access). In Management Studio it displays as a false/true value (at least in recent versions).
When accessing the database through ASP.NET it w...
ALTER TABLE to add a composite primary key
...ely better to use COMPOSITE UNIQUE KEY, as @GranadaCoder offered, a little bit tricky example though:
ALTER IGNORE TABLE table_name ADD UNIQUES INDEX idx_name(some_id, another_id, one_more_id);
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