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Changing font size and direction of axes text in ggplot2
...
Use theme():
d <- data.frame(x=gl(10, 1, 10, labels=paste("long text label ", letters[1:10])), y=rnorm(10))
ggplot(d, aes(x=x, y=y)) + geom_point() +
theme(text = element_text(size=20),
axis.text.x = element_text(angle=90, hju...
SQL query return data from multiple tables
...KA - Oh, the misery!
There are a number of ways to retrieve data from multiple tables in a database. In this answer, I will be using ANSI-92 join syntax. This may be different to a number of other tutorials out there which use the older ANSI-89 syntax (and if you are used to 89, may seem much les...
Simple explanation of clojure protocols
...ing existing classes/objects.
class AddOperator(left: Node, right: Node) < Node:
meth print:
left.print + '+' + right.print
meth eval
left.eval + right.eval
class NotOperator(expr: Node) < Node:
meth print:
'!' + expr.print
meth eval
!expr.eval
Here, adding a new ...
Why does a base64 encoded string have an = sign at the end
... "One case in which padding characters are required is concatenating multiple Base64 encoded files."
– André Puel
Nov 30 '14 at 19:41
1
...
Make install, but not to default directories?
... The problem i have with --prefix is that if you run a strings on the resulting binary afterwards, you see that the path is stored inside. I don't know why this happends, but I certainly dont want my machine paths on binaries that I ship to other users.
– Erik Aigner
...
MySQL Error 1153 - Got a packet bigger than 'max_allowed_packet' bytes
...on the command line:
mysql --max_allowed_packet=100M -u root -p database < dump.sql
Also, change the my.cnf or my.ini file under the mysqld section and set:
max_allowed_packet=100M
or you could run these commands in a MySQL console connected to that same server:
set global net_buffer_lengt...
Android: how do I check if activity is running?
...ivityManager) ctx.getSystemService(Context.ACTIVITY_SERVICE);
List<RunningTaskInfo> tasks = activityManager.getRunningTasks(Integer.MAX_VALUE);
for (RunningTaskInfo task : tasks) {
if (ctx.getPackageName().equalsIgnoreCase(task.baseActivity.getPackageName()))
...
Sass Variable in CSS calc() function
...
To use $variables inside your calc() of the height property:
HTML:
<div></div>
SCSS:
$a: 4em;
div {
height: calc(#{$a} + 7px);
background: #e53b2c;
}
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Why is 128==128 false but 127==127 is true when comparing Integer wrappers in Java?
...
public static Integer valueOf(int i) {
if(i >= -128 && i <= IntegerCache.high)
return IntegerCache.cache[i + 128];
else
return new Integer(i);
}
The value of high can be configured to another value, with the system property.
-Djava.lang.Integer.IntegerCa...
Binary search (bisection) in Python
...ft
def binary_search(a, x, lo=0, hi=None): # can't use a to specify default for hi
hi = hi if hi is not None else len(a) # hi defaults to len(a)
pos = bisect_left(a, x, lo, hi) # find insertion position
return pos if pos != hi and a[pos] == x else -1 # don't walk off the end
...