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Test for equality among all elements of a single vector
I'm trying to test whether all elements of a vector are equal to one another. The solutions I have come up with seem somewhat roundabout, both involving checking length() .
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PHP append one array to another (not array_push or +)
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$array1 = array_fill(0,50000,'aa');
$array2 = array_fill(0,100,'bb');
// Test 1 (array_merge)
$start = microtime(true);
$r1 = array_merge($array1, $array2);
echo sprintf("Test 1: %.06f\n", microtime(true) - $start);
// Test2 (avoid copy)
$start = microtime(true);
foreach ($array2 as $v) {
$ar...
Why does Python use 'magic methods'?
...re correct if Python only did this for the interactive shell, and required scripts to import the various parts from builtins they needed. Also probably different __ main__ handling would be nice in shells vs interactive. Anyway, check out all the functions, and see what it is like without them:
dir...
How would I get a cron job to run every 30 minutes?
I'm looking to add a crontab entry to execute a script every 30 minutes, on the hour and 30 minutes past the hour or something close. I have the following, but it doesn't seem to run on 0.
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How to display Base64 images in HTML?
...our image to Base64 (encode to Base64). You can do it online or with a PHP script.
After converting you will get the result as
iVBORw0KGgoAAAANSUhEUgAAABkAAAAZCAYAAADE6YVjAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAyJpVFh0WE1MOmNvbS5hZG9iZS54bXAAAAAAADw/eHBhY2tldCBiZWdpbj0i77u/IiBpZD0iVzV...
log all sql queries
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Oh, and one more thing to in django test runner ignores settings and overrides DEBUG to False, so in test you must @override_settings(DEBUG=True)
– Janusz Skonieczny
Oct 19 '17 at 15:14
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C# 'is' operator performance
... that requires fast performance. Within one of its inner loops, I need to test the type of an object to see whether it inherits from a certain interface.
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All Ruby tests raising: undefined method `authenticate' for nil:NilClass
Most of my tests are raising the following and I don't understand why. All methods call raise the 'authenticate' error. I've checked the code if there was a method called "authenticate" but there is no such method.
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Why do I get a segmentation fault when writing to a “char *s” initialized with a string literal, but
...red in the stack (relative to %rbp).
Note however that the default linker script puts .rodata and .text in the same segment, which has execute but no write permission. This can be observed with:
readelf -l a.out
which contains:
Section to Segment mapping:
Segment Sections...
02 .text ...
Why we should not use protected static in java
...String[] args) throws java.lang.Exception {
System.out.println(new Test2().getTest());
Test.test = "changed";
System.out.println(new Test2().getTest());
}
}
abstract class Test {
protected static String test = "test";
}
class Test2 extends Test {
public String g...