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What is the difference between user and kernel modes in operating systems?
...stem APIs to access hardware or
memory. Due to the protection afforded
by this sort of isolation, crashes in
user mode are always recoverable. Most
of the code running on your computer
will execute in user mode.
Read more
Understanding User and Kernel Mode
...
Maven command to list lifecycle phases along with bound goals?
...
Mabye I understood the question wrong, but this command is the "reverse lookup" to the question (Listing all phases this goal is in)? link says "Displays a list of the attributes for a Maven Plugin and/or goals (aka Mojo - Mave...
What causes imported Maven project in Eclipse to use Java 1.5 instead of Java 1.6 by default and how
...ted to add something to the answer already provided. maven-compiler-plugin by default will compile your project using Java 1.5 which is where m2e get's its information.
That's why you have to explicitly declare the maven-compiler-plugin in your project with something other then 1.5. Your effective ...
Coloring white space in git-diff's output
...d in red, you can then change core.whitespace, but blank-at-eol is enabled by default so you probably won't need to change that for the example you mention.
A possible source of confusion is that in the output of git diff, whitespace errors are only highlighted in the lines that are introduced, not...
Get list from pandas DataFrame column headers
...
You can get the values as a list by doing:
list(my_dataframe.columns.values)
Also you can simply use: (as shown in Ed Chum's answer):
list(my_dataframe)
share
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.gitignore file, where should I put it in my xcode project?
...is approach good if you want to exclude some type files which is generated by OS or any other logging, cashing and etc. tools.
Per-repository git ignore: - In this approach your custom rules will be applied to specific git directory in your machine. Local per-repository rules can be added to the .gi...
What is “Power Save Mode” in IntelliJ IDEA and other Jetbrains IDEs?
...when using your laptop and choose to run the inspections only occasionally by turning power save mode off for a minute or two, or using Code->Inspect code... to see what needs attention.
See Settings->Inspections to find out whether you can live without the specific inspections, which will de...
Representing and solving a maze given an image
... that final grayscale image is approximately uniform. You can do it simply by controlling sliders in Photoshop in Image -> Adjustments -> Black & White.
Convert image to binary by setting appropriate threshold in Photoshop in Image -> Adjustments -> Threshold.
Make sure threshold is ...
Heroku Postgres - terminate hung query (idle in transaction)
...gresql. Assuming that's not desirable or not an option ...)
Find the PID by running this sql:
SELECT pid , query, * from pg_stat_activity
WHERE state != 'idle' ORDER BY xact_start;
(The query may need mending dependent of the version of postgres - eventually, just select * from pg_stat_activi...
What is the difference between join and merge in Pandas?
...
foo 1 4
bar 2 5
The same functionality can be had by using merge on the columns follows:
left = pd.DataFrame({'key': ['foo', 'bar'], 'val': [1, 2]})
right = pd.DataFrame({'key': ['foo', 'bar'], 'val': [4, 5]})
left.merge(right, on=('key'), suffixes=('_l', '_r'))
key va...