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Iterate over object keys in node.js
...low for better optimisation.
Benchmark
As you can see Object.keys is significantly faster. Whether the actual memory storage is more optimum is a different matter.
var async = {};
async.forEach = function(o, cb) {
var counter = 0,
keys = Object.keys(o),
len = keys.length;
var next = f...
How to convert strings into integers in Python?
...mber converted to an integer:
print (int("1") + 1)
The above prints 2.
If you know the structure of your list, T1 (that it simply contains lists, only one level), you could do this in Python 2:
T2 = [map(int, x) for x in T1]
In Python 3:
T2 = [list(map(int, x)) for x in T1]
...
How do I copy an object in Java?
... use it. It's way too easy to create a class and do improper clone method. If you are going to do that, read at least what Joshua Bloch has to say about it in Effective Java.
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How to get the URL without any parameters in JavaScript?
If I use:
9 Answers
9
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Truncate a string straight JavaScript
...
If you want a substring starting from 0, then the substr function will do the exact same thing with 3 less chars ;)
– jackocnr
Sep 21 '14 at 18:55
...
How to get current memory usage in android?
...o get.
Usually, you'd like to know the status of the heap memory, since if it uses too much memory, you get OOM and crash the app.
For this, you can check the next values:
final Runtime runtime = Runtime.getRuntime();
final long usedMemInMB=(runtime.totalMemory() - runtime.freeMemory()) / 10485...
Ruby on Rails: How do you add add zeros in front of a number if it's under 10?
... lot of people using sprintf (which is the right thing to do), and I think if you want to do this for a string it's best to keep in mind the rjust and ljust methods:
"4".rjust(2, '0')
This will make the "4" right justified by ensuring it's at least 2 characters long and pad it with '0'. ljust doe...
How to delete all Annotations on a MKMapView
...userLocation];
[mapView removeAnnotations:[mapView annotations]];
if ( userLocation != nil ) {
[mapView addAnnotation:userLocation]; // will cause user location pin to blink
}
}
Example 2, I personally prefer to avoid removing the location user pin
in the first place,
-...
Entity Framework Timeouts
...
There is a known bug with specifying default command timeout within the EF connection string.
http://bugs.mysql.com/bug.php?id=56806
Remove the value from the connection string and set it on the data context object itself. This will work if you remove t...
RegEx to make sure that the string contains at least one lower case char, upper case char, digit and
...
If you need one single regex, try:
(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*\W)
A short explanation:
(?=.*[a-z]) // use positive look ahead to see if at least one lower case letter exists
(?=.*[A-Z]) // use positi...