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The difference between sys.stdout.write and print?
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print is just a thin wrapper that formats the inputs (modifiable, but by default with a space between args and newline at the end) and calls the write function of a given object. By default this object is sys.stdout, but you can pass a file using the "chevron" form. For example:
p...
How can I pretty-print JSON using node.js?
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JSON.stringify's third parameter defines white-space insertion for pretty-printing. It can be a string or a number (number of spaces). Node can write to your filesystem with fs. Example:
var fs = require('fs');
fs.writeFile('test.jso...
NSDictionary - Need to check whether dictionary contains key-value pair or not
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Just ask it for the objectForKey:@"b". If it returns nil, no object is set at that key.
if ([xyz objectForKey:@"b"]) {
NSLog(@"There's an object set for key @\"b\"!");
} else {
NSLog(@"No object set for key @\"b\"");
}
Edit: As to your edited second que...
Java ArrayList copy
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what if the array lists are nested (ArrayList<ArrayList<Object>>)? would this recursively create copies of all children ArrayList objects?
– Cat
Feb 24 '15 at 23:00
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Can one AngularJS controller call another?
...rvice)
{
// has a reference to the same instance of the service
// so if the service updates state for example, this controller knows about it
}
Another way is emitting an event on scope:
function FirstController($scope)
{
$scope.$on('someEvent', function(event, args) {});
// another co...
How to Right-align flex item?
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Here you go. Set justify-content: space-between on the flex container.
.main {
display: flex;
justify-content: space-between;
}
.a, .b, .c { background: #efefef; border: 1px solid #999; }
.b { text-align: center; }
<h2&...
ActiveRecord, has_many :through, and Polymorphic Associations
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There is a known issue with Rails 3.1.1 that breaks this functionality. If you are having this problem first try upgrading, it's been fixed in 3.1.2
You're so close. The problem is you're misusing the :source option. :source should points to the polymorphic belongs_to relationship. Then all you ...
Git pull results in extraneous “Merge branch” messages in commit log
...he target branch (in your case, the remote). As the recreated commits are different commits, this can cause a lot of confusion when developing together with others, especially when people already checked out parts of those commits before they get rewritten (for example with feature branches). So as ...
Determine if two rectangles overlap each other?
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if (RectA.Left < RectB.Right && RectA.Right > RectB.Left &&
RectA.Top > RectB.Bottom && RectA.Bottom < RectB.Top )
or, using Cartesian coordinates
(With X1 being left coord, X...
How to make rpm auto install dependencies
...ons:
# chown -R root.root /home/user/repo
Install the createrepo package if not installed yet, and run
# createrepo /home/user/repo
# chmod -R o-w+r /home/user/repo
Create a repository configuration file, e.g. /etc/yum.repos.d/myrepo.repo containing
[local]
name=My Awesome Repo
baseurl=file:///...