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Commenting in a Bash script inside a multiline command
...`#Put your comment here` \
def `#Another chance for a comment` \
xyz, etc.
And for pipelines specifically, there is a clean solution with no overhead:
echo abc | # Normal comment OK here
tr a-z A-Z | # Another normal comment OK here
sort | # The pipelines are auto...
京东618：算法让UV价值提升200%+，用智能卖场缩短购物路径 - 更多技术 - 清...
...示，该项目基于大数据挖掘、人工智能等技术能力，通过搜索、推荐、智能卖场、揽客计划、智慧物流、智慧数据等多种产品形态，对京东现有系统，从架构层的基础设施、数据平台、计算分析，到业务层的精准营销、智慧选品...
Accessing nested JavaScript objects and arays by string path
...ndow,'document.body') => <body>
resolvePath(window,'document.body.xyz') => undefined
resolvePath(window,'document.body.xyz', null) => null
resolvePath(window,'document.body.xyz', 1) => 1
Bonus:
To set a path (Requested by @rob-gordon) you can use:
const setPath = (object, path, va...
How to avoid isset() and empty()
I have several older applications that throw a lot of "xyz is undefined" and "undefined offset" messages when running on the E_NOTICE error level, because the existence of variables is not explicitly checked using isset() and consorts.
...
Detach (move) subdirectory into separate Git repository
...epo to be garbage-collected.
To clone your local repository:
git clone /XYZ /ABC
(Note: the repository will be cloned using hard-links, but that is not a problem since the hard-linked files will not be modified in themselves - new ones will be created.)
Now, let us preserve the interesting bran...
How can I use an array of function pointers?
... }; // if it is int the pointer incompatible is bound to happen
int xyz, i;
printf("Hello Function Pointer!\n");
F_P = fun;
xyz = F_P(5);
printf("The Value is %d\n", xyz);
//(*F_A[5]) = { F1, F2, F3, F4, F5 };
for (i = 0; i < 5; i++)
{
F_A[i]();
}
...
Numpy `logical_or` for more than two arguments
...separate arrays—in fact, that's how it's meant to be used:
>>> xyz = np.array((x, y, z))
>>> xyz
array([[ True, True, False, False],
[ True, False, True, False],
[False, False, False, False]], dtype=bool)
>>> np.logical_or.reduce(xyz)
array([ True, True...
Using python's eval() vs. ast.literal_eval()?
...ast.literal_eval("1+1") # output : 2
ast.literal_eval("{'a': 2, 'b': 3, 3:'xyz'}") # output : {'a': 2, 'b': 3, 3:'xyz'}
# type dictionary
ast.literal_eval("",{}) # output : Syntax Error required only one parameter
ast.literal_eval("__import__('os').system('rm -rf /')") # output : error
eval("__impo...
How do I turn off Oracle password expiration?
...ring comment) is to use one version of the ALTER USER command:
ALTER USER xyz_user ACCOUNT UNLOCK;
However the unlock command only works for accounts where the account is actually locked, but not for those accounts that are in the grace period, i.e. where the password is expired but the account i...
Undo scaffolding in Rails
...
To generate scaffolding :
rails generate scaffold xyz
To revert scaffolding :
rails destroy scaffold xyz
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