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How to debug Lock wait timeout exceeded on MySQL?
... see the affected table(s)
You get all kinds of additional Locking and Mutex Information.
Here is a sample from one of my clients:
mysql> show engine innodb status\G
*************************** 1. row ***************************
Type: InnoDB
Name:
Status:
=====================================...
Retrieve a single file from a repository
...
in git version 1.7.9.5 this seems to work to export a single file from a remote
git archive --remote=ssh://host/pathto/repo.git HEAD README.md
This will cat the contents of the file README.md.
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Padding characters in printf
...
Pure Bash, no external utilities
This demonstration does full justification, but you can just omit subtracting the length of the second string if you want ragged-right lines.
pad=$(printf '%0.1s' "-"{1..60})
padlength=40
string2='bbbbbbb'...
Python: Checking if a 'Dictionary' is empty doesn't seem to work
... behave properly. It just skips it and displays ONLINE without anything except of display the message. Any ideas why ?
8 ...
Pretty-print C++ STL containers
...uct delimiters_values
{
typedef TChar char_type;
const TChar *prefix;
const TChar *delimiter;
const TChar *postfix;
};
// Defines the delimiter values for a specific container and character type
template<typename T, typename TChar>
struct delimiters
{
static const delimite...
List vs tuple, when to use each? [duplicate]
...anted to implement a Point class. Would you use a tuple or a list to hold x, y, z coordinates? You would want to change the values (go with list), but at the same time order and position is meaningful and consistent (go with tuple?).
– Arlen
Aug 23 '11 at 15:...
How to check if a float value is a whole number
...), and that floating point arithmetic can be imprecise (a float is an approximation using binary fractions, not a precise real number). But adjusting your loop a little this gives:
>>> for n in range(12000, -1, -1):
... if (n ** (1.0/3)).is_integer():
... print n
...
27
8
1
0
...
What are all the common ways to read a file in Ruby?
...d
# File is closed automatically at end of block
It is also possible to explicitly close file after as above (pass a block to open closes it for you):
f = File.open("my/file/path", "r")
f.each_line do |line|
puts line
end
f.close
...
Add legend to ggplot2 line plot
...
All that's left is a simple ggplot command:
ggplot(dd) + geom_line(aes(x=fecha, y=value, colour=variable)) +
scale_colour_manual(values=c("red","green","blue"))
Example plot
share
|
improv...
Convert Python dict into a dataframe
..., is since calling the DataFrame constructor with scalar values (where it expects values to be a list/dict/... i.e. have multiple columns):
pd.DataFrame(d)
ValueError: If using all scalar values, you must must pass an index
You could take the items from the dictionary (i.e. the key-value pairs):
...