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What does SQL clause “GROUP BY 1” mean?
...rized the table fields.
If you are returning a unique set, or quickly performing a temporary lookup, this is nice shorthand syntax to reduce typing. If you plan to run the query again at some point, I’d recommend replacing those to avoid future confusion and unexpected complications (due to sche...
Run an exe from C# code
.../ </summary>
static void LaunchCommandLineApp()
{
// For the example
const string ex1 = "C:\\";
const string ex2 = "C:\\Dir";
// Use ProcessStartInfo class
ProcessStartInfo startInfo = new ProcessStartInfo();
startInfo.CreateNoWindow = f...
Is there a print_r or var_dump equivalent in Ruby / Ruby on Rails?
I'm looking for a way to dump the structure of an object, similar to the PHP functions print_r and var_dump for debugging reasons.
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SQLite select where empty?
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@Pacerier: There may be some difference in performance, but other than that it's just a matter of style.
– Guffa
Oct 15 '11 at 16:21
3
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Datatables: Cannot read property 'mData' of undefined
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FYI dataTables requires a well formed table. It must contain <thead> and <tbody> tags, otherwise it throws this error. Also check to make sure all your rows including header row have the same number of columns.
The following will throw error (...
How to get the HTML for a DOM element in javascript
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the problem with getting the innerHTML for the div's parent is that I'll also get the innerHTML for the div's siblings
– Richard H
Nov 19 '09 at 14:07
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When to use symbols instead of strings in Ruby?
... rule of thumb is to use symbols every time you need internal identifiers. For Ruby < 2.2 only use symbols when they aren't generated dynamically, to avoid memory leaks.
Full answer
The only reason not to use them for identifiers that are generated dynamically is because of memory concerns.
Th...
Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
... {
tmrTimer.Start();
}
for (int i = 0; i < marketDatas.Count; i++)
{
//Match the topic value
if (marketDatas[i].FieldName.Equals(strFieldName, StringComparison.OrdinalIgnoreCase) && marketDatas[i].KeyV...
How to Implement DOM Data Binding in JavaScript
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How would binding work for objects?
How listening to change in the form might work?
An abstraction that updates both objects
I suppose there are other techniques, but ultimately I'd have an object that holds reference to a related DOM eleme...
How to display HTML in TextView?
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For those who want it to work with the ol/ul/li tags, check out this solution: stackoverflow.com/a/3150456/1369016
– Tiago
Aug 26 '13 at 0:38
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