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SQL WHERE.. IN clause multiple columns
...m is that this method often incurs type conversions and completely ignores indexes, resulting in possibly horrible performance.
Despite these problems, I have to admit that I sometimes still use it for ad-hoc queries on small datasets.
SELECT * FROM T1
WHERE CONCAT(a,"_",b) IN
(SELECT CONCAT(a,"_"...
How can I echo a newline in a batch file?
...is a wonderful example to show that cmd.exe and Windows batch files are totally insane!
– mivk
Oct 15 '11 at 10:54
12
...
is node.js' console.log asynchronous?
...chronous in windows write this line at the start of your
code probably in index.js file. Any console.log after this statement will be considered as synchronous by interpreter.
if (process.stdout._handle) process.stdout._handle.setBlocking(true);
...
Using Git, how could I search for a string across all branches?
... From help.github.com/articles/searching-code: "Only the default branch is indexed for code search. In most cases, this will be the master branch."
– RedPanda
Feb 28 '18 at 22:55
...
Elegant solution to duplicate, const and non-const, getters? [duplicate]
...bout:
template<typename IN, typename OUT>
OUT BigChunk(IN self, int index) {
// big, non-trivial chunk of code...
return something;
}
struct FooBar {
Something &getSomething(int index) {
return BigChunk<FooBar*, Something&>(this,index);
}
const Some...
What is this 'Lambda' everyone keeps speaking of?
...g the forEach of array objects, becomes:
array.forEach(function (element, index) {
// do something useful with element
// element is the equivalent of array[i] from above
});
The above abstraction may not be that useful, but there are other higher order functions, like forEach, that perform...
How to check if the URL contains a given string?
...
You need add href property and check indexOf instead of contains
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
if (window.l...
Maximum number of records in a MySQL database table
... @Ext3h, Sphinx Search is usually a better choice than fulltext indexes in either MyISAM or InnoDB.
– Bill Karwin
Jan 31 '14 at 2:57
1
...
Split string to equal length substrings in Java
...tch.
Both lookbehind and \G are advanced regex features, not supported by all flavors. Furthermore, \G is not implemented consistently across the flavors that do support it. This trick will work (for example) in Java, Perl, .NET and JGSoft, but not in PHP (PCRE), Ruby 1.9+ or TextMate (both Onigu...
Is it possible to have nested templates in Go using the standard library?
...es on your own.
Consider the following example with two different pages ("index.html" and "other.html") that both inherit from "base.html":
// Content of base.html:
{{define "base"}}<html>
<head>{{template "head" .}}</head>
<body>{{template "body" .}}</body>
</...