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How to replace a character by a newline in Vim
...s a newline (more precisely, it’s treated as the input CR). Here’s a small, non-interactive example to illustrate this, using the Vim command line feature (in other words, you can copy and paste the following into a terminal to run it). xxd shows a hexdump of the resulting file.
echo bar > te...
Emacs bulk indent for Python
...enter 8 spaces.
PS. With Ubuntu, to make python-mode the default mode for all .py files, simply install the python-mode package.
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一分钟读懂低功耗蓝牙(BLE) MTU交换数据包 - 创客硬件开发 - 清泛IT社区，...
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SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”. error
...lipse, instead of it's embedded maven.
That is done in three steps:
1 Install maven on local machine (the test-machine was Ubuntu 10.10)
mvn --version
Apache Maven 2.2.1 (rdebian-4) Java version: 1.6.0_20 Java home:
/usr/lib/jvm/java-6-openjdk/jre Default locale: de_DE, platform
encoding: UTF-8 OS...
AngularJS browser autofill workaround by using a directive
...user's input. Also, 3 seconds is probably too long. You shouldn't have to call $apply() in a $timeout, BTW, it should queue a $digest for you automatically.
The real catch: Will your browser beat Angular to execution? What about my browser?
This is probably an unwinnable war, which is why Angular ...
invalid byte sequence for encoding “UTF8”
... the iconv utility to change encoding of the input data.
iconv -f original_charset -t utf-8 originalfile > newfile
You can change psql (the client) encoding following the instructions on Character Set Support. On that page, search for the phrase "To enable automatic character set conversion".
...
How to read from a file or STDIN in Bash?
...
The following solution reads from a file if the script is called
with a file name as the first parameter $1 otherwise from standard input.
while read line
do
echo "$line"
done < "${1:-/dev/stdin}"
The substitution ${1:-...} takes $1 if defined otherwise
the file name of t...
Named colors in matplotlib
... have been moved under the 'xkcd:' prefix since I posted this answer originally.
I really didn't change much from the matplotlib example, but here is the code for completeness.
import matplotlib.pyplot as plt
from matplotlib import colors as mcolors
colors = dict(mcolors.BASE_COLORS, **mcolors...
How to read a line from the console in C?
...ters it read. So you use fgetc:
char * getline(void) {
char * line = malloc(100), * linep = line;
size_t lenmax = 100, len = lenmax;
int c;
if(line == NULL)
return NULL;
for(;;) {
c = fgetc(stdin);
if(c == EOF)
break;
if(--len == 0)...
What's the “average” requests per second for a production web application?
... second vs. requests per second. I think requests/second is in that same ballpark(100 to 200) but with streaming it shoots up to 1140 records / second (doing ndjson). Anyways thought I would share more numbers. (not sure if this will change as that was tested streamed through 2 microservices into...