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Quickly find whether a value is present in a C array?
...ount / 8
pld [r1,#128]
ldmia r1!,{r4-r7} ; pre load first set
loop_top:
pld [r1,#128]
ldmia r1!,{r8-r11} ; pre load second set
cmp r4,r2 ; search for match
cmpne r5,r2 ; use conditional execution to avoid extra branch instructions
cmpne r6,r2
cmpne r7...
Getting an empty JQuery object
...Consider:
<select id="select" name="select">
<option value="msg_1">Message 1</option>
<option value="msg_2">Message 1</option>
<option value="msg_3">Message 1</option>
</select>
<div class="msg_1 msg_3">
...
</div>
<div class=...
Coalesce function for PHP?
...ay element is falsey will result in an error. $input['properties']['range_low'] ?: '?'
– Keyo
Jul 12 '11 at 23:28
...
Manually raising (throwing) an exception in Python
...hon!') # Don't! If you catch, likely to hide bugs.
For example:
def demo_bad_catch():
try:
raise ValueError('Represents a hidden bug, do not catch this')
raise Exception('This is the exception you expect to handle')
except Exception as error:
print('Caught this err...
What is the LD_PRELOAD trick?
...
If you set LD_PRELOAD to the path of a shared object, that file will be loaded before any other library (including the C runtime, libc.so). So to run ls with your special malloc() implementation, do this:
$ LD_PRELOAD=/path/to/my/malloc....
How to inherit from a class in javascript?
...sole issue?)
// In the Chrome console you should be able to drill down the __proto__ chain
// You can also look down the proto chain with Object.getPrototypeOf
// (Equivalent to tiger.__proto__)
console.log( Object.getPrototypeOf(tiger) ); // Mammal
console.log( Object.getPrototypeOf(Object.getPro...
How to debug heap corruption errors?
...ng at the top of your main() or equivalent in Microsoft Visual Studio C++
_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF | _CRTDBG_CHECK_ALWAYS_DF );
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...
Referencing system.management.automation.dll in Visual Studio
... However it created the *.dll only in C:\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Management.Automation/v4.0_3.0.0.0__31bf3856ad364e35.
– Alexander Samoylov
Apr 8 '19 at 13:41
...
How to hide keyboard in swift on pressing return key?
...miss the keyboard using the following function
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
self.view.endEditing(true)
return false
}
Here is a full example to better illustrate that:
//
// ViewController.swift
//
//
import UIKit
class ViewController: UIViewContro...
Str_replace for multiple items
I remember doing this before, but can't find the code. I use str_replace to replace one character like this: str_replace(':', ' ', $string); but I want to replace all the following characters \/:*?"<>| , without doing a str_replace for each.
...