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动态追踪（Dynamic Tracing）技术漫谈 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...是非常热情、同时非常聪明的工程师。我在 IRC 或者邮件列表里的提问，他们一般都会非常快且非常详尽地进行解答。值得一提的是，我也曾给 SystemTap 贡献过一个较为重要的新特性，使其能在任意的探针上下文中访问用户态的...
How to do a PUT request with curl?
...a file with a POST request:
curl -X POST "YOUR_URI" -F 'file=@/file-path.csv'
Alternative solution:
You can use the POSTMAN app from Chrome Store to get the equivalent cURL request. This is especially useful when writing more complicated requests.
For the request with other formats or for diff...
Progress indicator during pandas operations
...as being lazy about data import (pandas is just too good at handling messy csv!!) and a few of my entries (~1%) had completely whacked out insertions (think whole records inserted into single fields). Eliminating these cause a massive speed up in the feature rollup since there was no ambiguity abou...
JavaScript/jQuery to download file via POST with JSON data
...ge if the return mime type is something that a browser would open, but for csv and such it's perfect
Example requires underscore and jquery
var postData = {
filename:filename,
filecontent:filecontent
};
var fakeFormHtmlFragment = "<form style='display: none;' method='POST' action='"+SAV...
What is the meaning of erb?
...der a html page. But you can easily make it respond with .xml or .json or .csv if you write a web api for it
Erb is a library class that generates text. Nothing more. It expects a file that contains static text and ruby code mixed. It will run the ruby code and write the result to another file whic...
How to speed up insertion performance in PostgreSQL
...ch is according to the documentation is "somewhat faster than the text and CSV formats." Only do this if you have millions of rows to insert, and if you are comfortable with binary data.
Here is an example recipe in Python, using psycopg2 with binary input.
...
How to change Git log date formats
... This works a treat! Using a simple bash script to export a csv, now I can i have columns for year, month, week etc. Love it.
– Jamie Taylor
Mar 9 '16 at 9:18
1
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What are all the possible values for HTTP “Content-Type” header?
...ML (HTML mail).)
multipart/form-data
Type text
text/css
text/csv
text/html
text/javascript (obsolete)
text/plain
text/xml
Type video
video/mpeg
video/mp4
video/quicktime
video/x-ms-wmv
video/x-msvideo
video/x-flv
video/webm
Type vnd :
...
Which data type for latitude and longitude?
...able functions but is less accurate over very long distances.
Import your CSV to long lat fields to DECIMAL(10,6) columns. 6 digits is 10cm precision, should be plenty for most use cases.
Then cast your your imported data
SELECT
--ST_SetSRID(ST_Point(long, lat),4326) geom -- the wrong way be...
best way to preserve numpy arrays on disk
...o sacrifice a lot of performance, but it can be achieved fairly well using csv (which is also very portable of course).
More details and the code are available at the github repo.
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