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Creating an R dataframe row-by-row
...ficiently.
With some cleverness behind the scenes, you can sometimes arrange to have one foot in each world. Snapshot based file systems are a good example (which evolved from concepts such as union mounts, which also ply both sides).
If R Core wanted to do this, underlying vector storage co...
Sending images using Http Post
...<String, String> map = new HashMap<String, String>();
map.put("user_id", String.valueOf(userId));
map.put("action", "update");
url = addQueryParams(map, url);
HttpPost post = new HttpPost(url);
post.addHeader("Accept", "application/json");
MultipartEntityBuilder builder = MultipartEnti...
std::string to char*
...
The answer is bulky, inelegant, non-local, uses raw arrays, and requires attention to exception safety. vector was invented precisely as a wrapper for dynamic arrays, so not using it seems like a missed opportunity at best, and in violation of the spirit of C++ at worst.
...
Receive JSON POST with PHP
...
Use $HTTP_RAW_POST_DATA instead of $_POST.
It will give you POST data as is.
You will be able to decode it using json_decode() later.
share
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...
req.body empty on posts
...
This worked for me, why wasn't it working with raw encoded though?
– Daniel Kobe
Aug 1 '16 at 1:35
13
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Windows path in Python
...ty is
'C:\\mydir'
if you have problems with some names you can also try raw string literals:
r'C:\mydir'
however best practice is to use the os.path module functions that always select the correct configuration for your OS:
os.path.join(mydir, myfile)
From python 3.4 you can also use the pa...
How to randomize (shuffle) a JavaScript array?
....lengt()`. See Generating random whole numbers in JavaScript in a specific range? for a very comprehensive explanation.
– Marjan Venema
Dec 18 '16 at 20:17
13
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Ruby on Rails: how to render a string as HTML?
...;
OR
@str = "<b>Hi</b>"
<%= @str.html_safe %>
Using raw works fine, but all it's doing is converting the string to a string, and then calling html_safe. When I know I have a string, I prefer calling html_safe directly, because it skips an unnecessary step and makes it clearer ...
Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
... 127. It must be, according to JLS 5.1.7. It may be cached outside of that range, but doesn't have to be (and often isn't).
– yshavit
Apr 22 '16 at 19:07
...
File Upload without Form
... named file with properties of file_field to form_data
form_data.append("user_id", 123) // Adding extra parameters to form_data
$.ajax({
url: "/upload_avatar", // Upload Script
dataType: 'script',
cache: false,
contentType: false,
processData: false,
data: form_data, // S...