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Coalesce function for PHP?
...ay element is falsey will result in an error. $input['properties']['range_low'] ?: '?'
– Keyo
Jul 12 '11 at 23:28
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Installing python module within code
...upported by pip. Furthermore since pip v10, all code has been moved to pip._internal precisely in order to make it clear to users that programmatic use of pip is not allowed.
Use sys.executable to ensure that you will call the same pip associated with the current runtime.
import subprocess
import ...
Representing and solving a maze given an image
...d image directly.
Here is the MATLAB code for BFS:
function path = solve_maze(img_file)
%% Init data
img = imread(img_file);
img = rgb2gray(img);
maze = img > 0;
start = [985 398];
finish = [26 399];
%% Init BFS
n = numel(maze);
Q = zeros(n, 2);
M = zeros([size(maze) 2]);
...
How do I correctly clone a JavaScript object?
...f a function. Also, an object's prototype is referenced with the attribute __proto__, which is also hidden, and will not be copied by a for/in loop iterating over the source object's attributes. I think __proto__ might be specific to Firefox's JavaScript interpreter and it may be something different...
How to avoid .pyc files?
...terpreter. This setting is available
to Python programs as the
sys.dont_write_bytecode variable, and
Python code can change the value to
modify the interpreter’s behaviour.
Update 2010-11-27: Python 3.2 addresses the issue of cluttering source folders with .pyc files by introducing a spe...
gdb打印c++ std::vector元素内容 - C/C++ - 清泛网 - 专注C/C++及内核技术
gdb打印c++ std::vector元素内容gdb_vector_print使用GDB调试程序或coredump时，直接 p vec 打印的是vector内部成员的信息，不能直观输出元素的内容。通过打印内部元素地址内容的方式，查看vector元素内容，不限gcc版本：(gdb) 使用GDB调试程...
JSONDecodeError: Expecting value: line 1 column 1 (char 0)
...on
struct = {}
try:
try: #try parsing to dict
dataform = str(response_json).strip("'<>() ").replace('\'', '\"')
struct = json.loads(dataform)
except:
print repr(resonse_json)
print sys.exc_info()
Note: Quotes within the data must be properly escaped
...
Get the first key name of a javascript object [duplicate]
...
If you decide to use Underscore.js you better do
_.values(ahash)[0]
to get value, or
_.keys(ahash)[0]
to get key.
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What's the proper way to install pip, virtualenv, and distribute for Python?
In my answer to SO question 4314376 , I recommended using ez_setup so that you could then install pip and virtualenv as follows:
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Refresh a page using PHP
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In PHP you can use:
$page = $_SERVER['PHP_SELF'];
$sec = "10";
header("Refresh: $sec; url=$page");
Or just use JavaScript's window.location.reload().
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