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convert a list of objects from one type to another using lambda expression
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If you know you want to convert from List<T1> to List<T2> then List<T>.ConvertAll will be slightly more efficient than Select/ToList because it knows the exact size to start with:
target = orig.ConvertAll(x => n...
How to make a phone call using intent in Android?
...t placed call permissions tag before application tag in manifest file
and now every thing is working fine.
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Is there a case insensitive jQuery :contains selector?
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Just wanted to let folks know that the solution as described by @Pat and others for jQuery 1.3 also works for 1.4.3.
– Jim Ade
Nov 3 '10 at 17:54
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Remove columns from dataframe where ALL values are NA
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dplyr now has a select_if verb that may be helpful here:
library(dplyr)
temp <- data.frame(x = 1:5, y = c(1,2,NA,4, 5), z = rep(NA, 5))
not_all_na <- function(x) any(!is.na(x))
not_any_na <- function(x) all(!is.na(x))
&g...
How can I mark “To Do” comments in Xcode?
...=#warnings
in my cflags so as to not treat pragma warnings as errors. So now #warning and -Werror can live along side each other.
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How to undo a git pull?
...git pull on account of unwanted commits on the remote origin, but I don't know to which revision I have to reset back to.
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How to document Ruby code?
...look at the RDoc documentation to learn about the kinds of tags that RDoc knows how to format. To that end, I'd reformat your comment as follows:
# Runs a subprocess and applies handlers for stdout and stderr
# Params:
# +command+:: command line string to be executed by the system
# +outhan...
How do I move a file (or folder) from one folder to another in TortoiseSVN?
... delete operation, but there's not really a way around that - as far as I know - in Subversion.
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try {} without catch {} possible in JavaScript?
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Looks a lot clean now. Thanks for sharing!
– LeOn - Han Li
Nov 19 '19 at 20:54
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Sqlite primary key on multiple columns
...LE something (
column1, column2, value, PRIMARY KEY (column1, column2));
Now this works without any warning:
sqlite> insert into something (value) VALUES ('bla-bla');
sqlite> insert into something (value) VALUES ('bla-bla');
sqlite> select * from something;
NULL|NULL|bla-bla
NULL|NULL|bl...