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Xcode - How to fix 'NSUnknownKeyException', reason: … this class is not key value coding-compliant f
...orUndefinedKey:]: this class is not key value coding-compliant for the key string.'
It is caused by the Second view controller in MainWindow.xib having a class of UIViewController instead of SecondView. Changing to the correct class resolves the problem.
By the way, it is bad practice to have na...
Most efficient method to groupby on an array of objects
...ypeScript signature: var groupBy = function<TItem>(xs: TItem[], key: string) : {[key: string]: TItem[]} { ...
– Michael Sandino
Dec 7 '17 at 9:47
...
How to check that an element is in a std::set?
...lly get std::set::contains method.
#include <iostream>
#include <string>
#include <set>
int main()
{
std::set<std::string> example = {"Do", "not", "panic", "!!!"};
if(example.contains("panic")) {
std::cout << "Found\n";
} else {
std::cout ...
How can I time a code segment for testing performance with Pythons timeit?
...de into a function is a step I was looking for -since simply making code a string and evaling is not going to fly for anything not completely trivial. thx
– javadba
Sep 28 '18 at 22:18
...
File.separator vs FileSystem.getSeparator() vs System.getProperty(“file.separator”)?
...
System.getProperties() can be overridden by calls to System.setProperty(String key, String value) or with command line parameters -Dfile.separator=/
File.separator gets the separator for the default filesystem.
FileSystems.getDefault() gets you the default filesystem.
FileSystem.getSeparator()...
How can I access an object property named as a variable in php?
...
Since the name of your property is the string '$t', you can access it like this:
echo $object->{'$t'};
Alternatively, you can put the name of the property in a variable and use it like this:
$property_name = '$t';
echo $object->$property_name;
You can ...
When to use std::size_t?
... something so it's natural to use it, for example, getting the length of a string and then processing each character:
for (size_t i = 0, max = strlen (str); i < max; i++)
doSomethingWith (str[i]);
You do have to watch out for boundary conditions of course, since it's an unsigned type. The ...
Bundling data files with PyInstaller (--onefile)
... Thanks @dilde! Not that the a.datas array from step 5 takes tuples of strings, see pythonhosted.org/PyInstaller/spec-files.html#adding-data-files for reference.
– Ian Campbell
Sep 5 '17 at 17:55
...
How to recover a dropped stash in Git?
...nt $3}'
...or using Powershell for Windows:
git fsck --no-reflog | select-string 'dangling commit' | foreach { $_.ToString().Split(" ")[2] }
This will show you all the commits at the tips of your commit graph which are no longer referenced from any branch or tag – every lost commit, including ev...
Fast way to get image dimensions (not filesize)
... check these functions/method using PHP:
public function ByteStreamImageString($ByteStream,&$Formato,&$Alto,&$Ancho) {
$Alto = 0;
$Ancho = 0;
$Formato = -1;
$this->HexImageString = "Error";
if (ord($ByteStream[0])==137 && ord($ByteStream[1])==80 &&am...