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Python, creating objects
... s1. But again I'm not sure what they want s1 to be? I can do this with an array {'name' : name..etc} but that didn't give me a correct answer so I'm assuming I need to implement what I learned from classes and instances
– Mohsen M. Alrasheed
Feb 26 '13 at 5:03...
Implications of foldr vs. foldl (or foldl')
...:reduce, C++'s accumulate, C#'s Aggregate, Smalltalk's inject:into:, PHP's array_reduce, Mathematica's Fold, etc. Common Lisp's reduce defaults to left fold but there's an option for right fold.
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Convert data.frame columns from factors to characters
...ctor.
> levels(fact)
[1] "a" "b" "d"
Notice that levels() returns an array of characters. You can use this fact to easily and compactly convert factors to strings or numerics like this:
> fact_character <- levels(fact)[as.numeric(fact)]
> fact_character
[1] "a" "b" "a" "d"
This als...
Running shell command and capturing the output
...swered Feb 13 '12 at 19:41
byte_arraybyte_array
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Understanding typedefs for function pointers in C
...signal number because the same function is used for both.
Then I create an array of structures, where each element identifies a signal number and the handler to be installed for that signal. I've chosen to worry about 3 signals; I'd often worry about SIGHUP, SIGPIPE and SIGTERM too and about whethe...
How to replace (or strip) an extension from a filename in Python?
...' -> [ 'foo.bar', 'baz' ]). Since rsplit will always return a non-empty array, we may safely index 0 into it to get the filename minus the extension.
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Assign output of a program to a variable using a MS batch file
...sk get name /value | findstr "Name""
The macro uses the variable like an array and stores each line in a seperate index.
In the sample of %$set% allDrives="wmic logicaldisk there will the following variables created:
allDrives.Len=5
allDrives.Max=4
allDrives[0]=Name=C:
allDrives[1]=Name=D:
allD...
How to check that a string is an int, but not a double, etc.?
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How about using ctype_digit?
From the manual:
<?php
$strings = array('1820.20', '10002', 'wsl!12');
foreach ($strings as $testcase) {
if (ctype_digit($testcase)) {
echo "The string $testcase consists of all digits.\n";
} else {
echo "The string $testcase does not ...
How to increase the Java stack size?
...24" by the recurring lines in the stack trace?
Obviously, the stack trace array length in Throwable seems to be limited to 1024.
Try the following program:
public class Test {
public static void main(String[] args) {
try {
System.out.println(fact(1 << 15));
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C read file line by line
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In your readLine function, you return a pointer to the line array (Strictly speaking, a pointer to its first character, but the difference is irrelevant here). Since it's an automatic variable (i.e., it's “on the stack”), the memory is reclaimed when the function returns. You see ...