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How to load a UIView using a nib file created with Interface Builder
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What about a case when this view appears on multiple parent views? So do you propose to edit xib for each of them manually? It is TOO BAD!!!
– user2083364
Feb 4 '14 at 14:42
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promise already under evaluation: recursive default argument reference or earlier problems?
...=x cause this. Eliminating the two instances where they occur we get:
f <- function(x, T) {
10 * sin(0.3 * x) * sin(1.3 * x^2) + 0.001 * x^3 + 0.2 * x + 80
}
g <- function(x, T, f. = f) { ## 1. note f.
exp(-f.(x)/T)
}
test<- function(g. = g, T = 1) { ## 2. note g.
g.(1,T)
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How to stop a goroutine
...ocess the items coming out of the chan, you can make use of the "close" builtin and the special receive form for channels.
That is, once you're done sending items on the chan, you close it. Then inside your goroutine you get an extra parameter to the receive operator that shows whether the channel...
When should I use a composite index?
...B, column_C )
will benefit a query that uses those fields for joining, filtering, and sometimes selecting. It will also benefit queries that use left-most subsets of columns in that composite. So the above index will also satisfy queries that need
index( column_A, column_B, column_C )
index( colu...
UILabel text margin [duplicate]
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For multiline text the left and the right margin can be set by using NSAttributedString.
NSMutableParagraphStyle *style = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
style.alignment = NSTextAlignmentJustified;
style.fi...
Import text file as single character string
...Ulrich that uses the correct size instead of a hard-coded size:
fileName <- 'foo.txt'
readChar(fileName, file.info(fileName)$size)
Note that readChar allocates space for the number of bytes you specify, so readChar(fileName, .Machine$integer.max) does not work well...
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How do I remove the passphrase for the SSH key without having to create a new key?
... -f keyfile without having to specify -P nor -N, and that the keyfile defaults to ~/.ssh/id_rsa, so in many cases, it's not even needed.
You might want to consider using ssh-agent, which can cache the passphrase for a time. The latest versions of gpg-agent also support the protocol that is used by ...
How do I check if a SQL Server text column is empty?
...t values other than null and empty:
SELECT * FROM myTable WHERE myColumn <> ''
And remember use LIKE phrases only when necessary because they will degrade performance compared to other types of searches.
share
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Rails: Why does find(id) raise an exception in rails? [duplicate]
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That still doesn't explain why it's the default behaviour where in most all other parts of ActiveRecord, the default behaviour is to return nil or false for failures, and leave the exception control flow to methods ending in a bang (#save!).
– Mart...
Is mongodb running?
...on your OS
or
/etc/init.d/mongodb status # for MongoDB version < 2.6
/etc/init.d/mongod status # for MongoDB version >= 2.6
or
service mongod status
to see if mongod is running (you need to be root to do this, or prefix everything with sudo). Please note that the '...