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R data formats: RData, Rda, Rds etc
... name, for instance.
You may readRDS() and save(), or load() and saveRDS() selectively.
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Pointer to class data member “::*”
...unction that would do some pre &post processing before applying a user-selected member function to an object:
void Apply( SomeClass * c, void (SomeClass::*func)() ) {
// do hefty pre-call processing
(c->*func)(); // call user specified function
// do hefty post-call processing
}...
What is the difference between pluck and collect in Rails?
...ds with Rails 4, still use pluck
if you need some fields with Rails 3, use selectand collect
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Create Pandas DataFrame from a string
...ork is to copy-and-paste the text by loading the data from the clipboard.
Select the content of the string with your mouse:
In the Python shell use read_clipboard()
>>> pd.read_clipboard()
col1;col2;col3
0 1;4.4;99
1 2;4.5;200
2 3;4.7;65
3 4;3.2;140
Use the ap...
What is the difference between and ?
...m CSS (hyphens: auto), then lang attribute is required to allow browser to select proper set of rules.
– RobertT
Oct 30 '14 at 2:42
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How to run travis-ci locally
...ainer Based Docker Image Locally
Download and install the Docker Engine.
Select an image from Docker Hub. If you're not using a language-specific image pick ci-ruby. Open a terminal and start an interactive Docker session using the image URL:
docker run -it travisci/ubuntu-ruby:18.04 /bin/bash
S...
How can I convince IE to simply display application/json rather than offer to download it?
... Notepad.
To do this, create or find a .json file, right mouse click, and select "Open With" or "Choose Default Program."
This might come in handy if you by chance want to use Internet Explorer but your IT company wont let you edit your registry. Otherwise, I recommend the above answers.
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How to find the array index with a value?
...t",
"subject": "chemistry"
},
];
Now if we have a requirement to select a particular object in the array. Let us assume that we want to find index of student with name Tanmay.
We can do that by iterating through the array and comparing value at the given key.
function functiontofindIndex...
Disabled href tag
...doesn't have a disabled attribute, that's just for <input>s (and <select>s and <textarea>s).
To "disable" a link, you can remove its href attribute, or add a click handler that returns false.
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What is the difference between BIT and TINYINT in MySQL?
...deployed everything on linux, I had problems with queries that inserted or selected from tables that had BIT DATA TYPE.
Bit is not safe for now.
I changed to tinyint(1) and worked perfectly. I mean that you only need a value to diferentiate if it's 1 or 0 and tinyint(1) it's ok for that
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