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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.
...
BLE(二)信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区,...
...acteristic,看到它的UUID为2A06。然后我们到蓝牙官网定义的列表Characteristics搜索2A06,进入Characteristic的详情页面。
于是,该Characteristic操作定义非常明确了。点击“Write new value”,可以写入新的值。若写入1或2,则可以引起手环...
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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Django ModelForm: What is save(commit=False) used for?
..._type = "audio"
if attachment.filename.lower().endswith(('.csv','.dif','.ods','.xls','.tsv','.dat','.db','.xml','.xlsx','.xlr')):
attachment.file_type = "spreasheet"
if attachment.filename.lower().endswith(('.doc','.pdf','.rtf','.txt')):
...
How to create a temporary directory?
...UIT TERM
trap 'rm -rf "$TMPDIR"' EXIT
# Example use of TMPDIR:
for f in *.csv; do
cp "$f" "$TMPDIR"
# remove duplicate lines but keep order
perl -ne 'print if ++$k{$_}==1' "$TMPDIR/$f" > "$f"
done
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MFC 的SetWindowPos 用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...:保持当前大小(忽略cx和cy)
SWP_NOZORDER:保持窗口在列表的当前位置(忽略hWndInsertAfter)
SWP_SHOWWINDOW:显示窗口
这些参数可以使用Or运算组合,所以如果你不希望改变窗口位置和大小,你只需要给最后一个参数传递(S...
