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Efficiency of premature return in a function
This is a situation I encounter frequently as an inexperienced programmer and am wondering about particularly for an ambitious, speed-intensive project of mine I'm trying to optimize. For the major C-like languages (C, objC, C++, Java, C#, etc) and their usual compilers, will these two functions ru...
Use LINQ to get items in one List, that are not in another List
...e fine, but could introduce performance issues, and especially if the data set is quite large. If this doesn't satisfy your performance requirements, you may need to evaluate other options. Since the stated requirement is for a solution in LINQ, however, those options aren't explored here. As always...
Random String Generator Returning Same String [duplicate]
I've developed a random string generator but it's not behaving quite as I'm hoping. My goal is to be able to run this twice and generate two distinct four character random strings. However, it just generates one four character random string twice.
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Read a variable in bash with a default value
I need to read a value from the terminal in a bash script. I would like to be able to provide a default value that the user can change.
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How to make MySQL handle UTF-8 properly
...Update:
Short answer - You should almost always be using the utf8mb4 charset and utf8mb4_unicode_ci collation.
To alter database:
ALTER DATABASE dbname CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
See:
Aaron's comment on this answer How to make MySQL handle UTF-8 properly
What's the di...
where is gacutil.exe?
...s The VS Developer Command Prompt will open with the environment correctly set, for that version of VS.
– Falconne
Sep 2 at 19:55
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Correct way to close nested streams and writers in Java [duplicate]
Note: This question and most of its answers date to before the release of Java 7. Java 7 provides Automatic Resource Management functionality for doing this easilly. If you are using Java 7 or later you should advance to the answer of Ross Johnson .
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How do I profile memory usage in Python?
...t;> from guppy import hpy; h=hpy()
>>> h.heap()
Partition of a set of 48477 objects. Total size = 3265516 bytes.
Index Count % Size % Cumulative % Kind (class / dict of class)
0 25773 53 1612820 49 1612820 49 str
1 11699 24 483960 15 2096780 64 tuple
...
Declaring a custom android UI element using XML
...Create constructors
Since there are two constructors that use an AttributeSet for initialisation, it is convenient to create a separate initialisation method for the constructors to call.
private void init(AttributeSet attrs) {
TypedArray a=getContext().obtainStyledAttributes(
attrs...
Stack, Static, and Heap in C++
...favor of tightly controlling the allocation process by using buffers of preset sizes for all allocations.)
Stack variables are useful for when you know that as long as the function is in scope (on the stack somewhere), you will want the variables to remain. Stacks are nice for variables that you ne...