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Android: Specify two different images for togglebutton using XML
...d come last. Arrange the items in the following manner to ensure they will all be utilized:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true" android:state_pressed="true" /> //currently pressed turning the toggle on
<item...
What is the difference between `let` and `var` in swift?
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C and C++ allows Unicode identifiers as well, via UCNs. If the compiler supports any Unicode source encoding then you can just use the Unicode characters directly. For example auto ???????? = "dogcow"; works in C++ for clang.
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“register” keyword in C?
... a processor register if possible.
Most modern compilers do that automatically, and are better at picking them than us humans.
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Why am I getting this error: No mapping specified for the following EntitySet/AssociationSet - Entit
...s library. Shouldn't it be a warning or something?
To prevent this error, All you have to do after inserting a new entity is to Generate Database From Model again. That will update the SSDL and fix the mappings.
EDIT
If you are not using model-first and you "update from database", you will also h...
How to create P12 certificate for iOS distribution
...rom your hard drive
Click Generate
Click Download to get the file
C. Install .cer and generate .p12 certificate
Find .cer file you’ve downloaded and double-click
Set Login drop-down to “login" and Click Add
Open up KeyChain Access and you'll find profile created in Step A
You can expand “p...
What is the difference between an expression and a statement in Python?
...s, where operators include arithmetic and boolean operators, the function call operator () the subscription operator [] and similar, and can be reduced to some kind of "value", which can be any Python object. Examples:
3 + 5
map(lambda x: x*x, range(10))
[a.x for a in some_iterable]
yield 7
Stat...
Why are Python lambdas useful? [closed]
...ut lambda functions? Like
lambda x: x**2 + 2*x - 5
Those things are actually quite useful. Python supports a style of programming called functional programming where you can pass functions to other functions to do stuff. Example:
mult3 = filter(lambda x: x % 3 == 0, [1, 2, 3, 4, 5, 6, 7, 8, 9])...
How to join int[] to a character separated string in .NET?
...formance. Join method needs to know the size of the data to effectively preallocate necessary amount of memory.
Here is a part of internal implementation of String.Join method:
// length computed from length of items in input array and length of separator
string str = FastAllocateString(length);
f...
Modelling an elevator using Object-Oriented Analysis and Design [closed]
... This is one of them; unfortunately, my OOP professor in college never actually gave an answer to it, and so I've been wondering.
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sed edit file in place
... out if it is possible to edit a file in a single sed command without manually streaming the edited content into a new file and then renaming the new file to the original file name. I tried the -i option but my Solaris system said that -i is an illegal option. Is there a different way?
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