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Ruby, Difference between exec, system and %x() or Backticks
...either true, false or nil. In the example the date was printed through the IO object of STDIN. The method will return true if the process exited with a zero status, false if the process exited with a non-zero status and nil if the execution failed.
Another side effect is that the global variable $?...
Difference between fmt.Println() and println() in Go
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println is an built-in function (into the runtime) which may eventually be removed, while the fmt package is in the standard library, which will persist. See the spec on that topic.
For language developers it is handy to have a println without dependen...
Two versions of python on linux. how to make 2.7 the default
I've got two versions of python on my linuxbox:
6 Answers
6
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How to open a file for both reading and writing?
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@JossefHarush Note that the documentation for a states 'on some Unix systems, means that all writes append to the end of the file regardless of the current seek position'. In this case the f.seek(0) won't work as expected. I just fell foul of this on Linux.
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What parameters should I use in a Google Maps URL to go to a lat-lon?
...rsal cross-platform links. Now you can open Google maps on web, Android or iOS using the same URL string in form:
https://www.google.com/maps/search/?api=1&parameters
There are several modes that you can use: search, directions, show map and show street view.
So you can use something like
h...
How to minify php page html output?
...t 70%. (If you use Apache, the module configuring gzip depends on your version: Apache 1.3 uses mod_gzip while Apache 2.x uses mod_deflate.)
Accept-Encoding: gzip, deflate
Content-Encoding: gzip
Use the following snippet to remove white-spaces from the HTML with the help ob_start's buffer:
<?ph...
Image resizing client-side with JavaScript before upload to the server
...s this:
https://gist.github.com/dcollien/312bce1270a5f511bf4a
(an es6 version, and a .js version which can be included in a script tag)
You can use it as follows:
<input type="file" id="select">
<img id="preview">
<script>
document.getElementById('select').onchange = function(ev...
Plot smooth line with PyPlot
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For this example spline works well, but if the function is not smooth inherently and you want to have smoothed version you can also try:
from scipy.ndimage.filters import gaussian_filter1d
ysmoothed = gaussian_filter1d(y, sigma=2)
plt.plot(x, ysmoothed)
plt.show()
if you i...
How do I move an existing Git submodule within a Git repository?
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Note: As mentioned in the comments this answer refers to the steps needed with older versions of git. Git now has native support for moving submodules:
Since git 1.8.5, git mv old/submod new/submod works as expected and does all the ...
Custom Cell Row Height setting in storyboard is not responding
...m the "row height" setting inside the "size inspector" of the cell in question. When I run the app on my iPhone the cell has the default size set from the "row size" in the table view.
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