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How to set different label for launcher rather than activity title?
...lter> can have a label attribute. If it's absent the label is inherited from the parent component (either Activity or Application). So using this, you can set a label for the launcher icon, while still having the Activity with it's own title.
Note that, while this works on emulators, it might no...
What's the main difference between int.Parse() and Convert.ToInt32
...er in string format), you'd use Int32.Parse().
If you're collecting input from a user, you'd generally use Int32.TryParse(), since it allows you more fine-grained control over the situation when the user enters invalid input.
Convert.ToInt32() takes an object as its argument. (See Chris S's answe...
XML attribute vs XML element
...ed):
<note day="12" month="11" year="2002"
to="Tove" to2="John" from="Jani" heading="Reminder"
body="Don't forget me this weekend!">
</note>
Source: http://www.w3schools.com/xml/xml_dtd_el_vs_attr.asp
...
Get users by name property using Firebase
...I do:
FirebaseRef.child('users').child(id).set(userData);
This id comes from:
var ref = new Firebase(FIREBASE);
var auth = $firebaseAuth(ref);
auth.$authWithOAuthPopup("facebook", {scope: permissions}).then(function(authData) {
var userData = {}; //something that also comes from authData
...
Why does ++[[]][+[]]+[+[]] return the string “10”?
...e over +):
++[[]][0]
+
[0]
Because [[]][0] means: get the first element from [[]], it is true that:
[[]][0] returns the inner array ([]). Due to references it's wrong to say [[]][0] === [], but let's call the inner array A to avoid the wrong notation.
++ before its operand means “increment by...
How to check if a map contains a key in Go?
...:
initializes two variables - val will receive either the value of "foo" from the map or a "zero value" (in this case the empty string) and ok will receive a bool that will be set to true if "foo" was actually present in the map
evaluates ok, which will be true if "foo" was in the map
If "foo" i...
How to normalize an array in NumPy?
...kit-learn you can use sklearn.preprocessing.normalize:
import numpy as np
from sklearn.preprocessing import normalize
x = np.random.rand(1000)*10
norm1 = x / np.linalg.norm(x)
norm2 = normalize(x[:,np.newaxis], axis=0).ravel()
print np.all(norm1 == norm2)
# True
...
Why is there a difference in checking null against a value in VB.NET and C#?
... Why answer the question by trial and error? Should be possible to do it from the language specifications.
– David Heffernan
Mar 20 '13 at 12:59
3
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Printing 1 to 1000 without loop or conditionals
Task : Print numbers from 1 to 1000 without using any loop or conditional statements. Don't just write the printf() or cout statement 1000 times.
...
How to make a variadic macro (variable number of arguments)
...VA_ARGS__) does the job the portable way; the fmt parameter can be omitted from the definition.
– alecov
Jun 11 '12 at 20:14
4
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