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Java Singleton and Synchronization
Please clarify my queries regarding Singleton and Multithreading:
8 Answers
8
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Ruby on Rails - Import Data from a CSV file
...ase table. I do not want to save the CSV file, just take the data from it and put it into the existing table. I am using Ruby 1.9.2 and Rails 3.
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Get bitcoin historical data [closed]
...bitcoincharts.com/v1/csv/
it is updated twice a day for active exchanges, and there is a few dead exchanges, too.
EDIT: Since there are no column headers in the CSVs, here's what they are :
column 1) the trade's timestamp,
column 2) the price,
column 3) the volume of the trade
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How to use ELMAH to manually log errors
...g rules to the exception. Log method does not.
Raise is subscription based and is able to log one exception into the several loggers.
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How do I add a new sourceset to Gradle?
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This took me a while to figure out and the online resources weren't great. So I wanted to document my solution.
This is a simple gradle build script that has an intTest source set in addition to the main and test source sets:
apply plugin: "java"
sourceSets...
jQuery UI Dialog - missing close icon
...tom jQuery 1.10.3 theme. I downloaded every straight from the theme roller and I have intentionally not changed anything.
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How to get unique values in an array
...hat uses no libraries. This requires two new prototype functions, contains and unique
Array.prototype.contains = function(v) {
for (var i = 0; i < this.length; i++) {
if (this[i] === v) return true;
}
return false;
};
Array.prototype.unique = function() {
var arr = [];
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Understanding colors on Android (six characters)
I am trying to understand how colors work in Android. I have this color set as the background of my LinearLayout , and I get a background gray with some transparency:
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Convert UTC Epoch to local date
...the proper epoch, but the only method that seems useful is toUTCString() and strings don’t help me. If I pass that string into a new date, it should notice that it’s UTC, but it doesn’t.
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Read Excel File in Python
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A somewhat late answer, but with pandas it is possible to get directly a column of an excel file:
import pandas
import xlrd
df = pandas.read_excel('sample.xls')
#print the column names
print df.columns
#get the values for a given column
values = df['Arm_id']...