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open() in Python does not create a file if it doesn't exist
...pos [, (0|1|2)])
pos .. position of the r/w pointer
[] .. optionally
() .. one of ->
0 .. absolute position
1 .. relative position to current
2 .. relative position from end
Only "rwab+" characters are allowed; there must be exactly one of "rwa" - see Stack Overflow question Python fi...
recursively add file extension to all files
... seen bash scripts for changing the file extension but not for just adding one. It also needs to be recursive, can someone help please?
...
What is the purpose of Android's tag in XML layouts?
... merge tag isn't necessary in this example but that's only because there's one element in layout2. If layout2 had multiple elements, then it MUST have a root node to be valid XML and that's when the merge tag comes in handy.
– gMale
Feb 22 '14 at 16:37
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What are the recommendations for html tag?
...aring all relative links relative to it, including those kind of anchors. None of the relative links are relative to the current request URI anymore (as would happen without the <base> tag). This may in first place be confusing for starters. To construct those anchors the right way, you basica...
MySQL Creating tables with Foreign Keys giving errno: 150
...hen the Child table. If both tables references each other, you must create one table without FK constraints, then create the second table, then add the FK constraint to the first table with ALTER TABLE.
The two tables must both support foreign key constraints, i.e. ENGINE=InnoDB. Other storage engi...
Duplicate and rename Xcode project & associated folders [closed]
...s other StackOverflow posts and tutorials around the internet brought into one place for my future reference, and to help anyone else who may be facing the same issue. All credit is given for other answers at the end.
Duplicating an Xcode Project
In the Finder, duplicate the project folder to the...
vs
...
In HTML5, they are equivalent. Use the shorter one, it is easier to remember and type. Browser support is fine since it was designed for backwards compatibility.
share
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Do you get charged for a 'stopped' instance on EC2? [closed]
...ave linked: Each time you start a stopped instance we charge a minimum of one minute for usage. After one minute, we charge only for the seconds you use. For example, if you run an instance for 20 seconds and then stop it, we charge for a full one minute. If you run an instance for 3 minutes and 40...
Force R not to use exponential notation (e.g. e+10)?
...e applied when deciding to print
numeric values in fixed or exponential notation. Positive
values bias towards fixed and negative towards scientific
notation: fixed notation will be preferred unless it is more
than ‘scipen’ digits wider.
Example...
Adding a column to a data.frame
... c(1:4, 1:7, 1:5), h_freq = runif(16), h_freqsq = runif(16))
# find where one appears and
from <- which(your.df$no == 1)
to <- c((from-1)[-1], nrow(your.df)) # up to which point the sequence runs
# generate a sequence (len) and based on its length, repeat a consecutive number len times
get....