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Mysql - How to quit/exit from stored procedure
...IF <Some Error Condition> THEN
SIGNAL CUSTOM_EXCEPTION
SET MESSAGE_TEXT = 'Your Custom Error Message';
END IF;
Note SQLSTATE '45000' equates to "Unhandled user-defined exception condition". By default, this will produce an error code of 1644 (which has that same meaning)....
How to trigger a build only if changes happen on particular set of files
...yntax of Jenkinsfile to describe your building pipeline, you can use changeset condition to limit stage execution only to the case when specific files are changed. This is now a standard feature of Jenkins and does not require any additional configruation/software.
stages {
stage('Nginx') {
...
“Width equals height” constraint in Interface Builder
... the width/height editor lacks the fields to relate to another property or set the ratio:
Therefore, you can't express the following code in Interface Builder:
CGFloat ratio = 1.0;
NSLayoutConstraint *constraint = [NSLayoutConstraint
constraintWithItem:myView
attribute:NSLayoutAttributeW...
Pass complex parameters to [Theory]
...put> : TheoryDatum
{
public TSystemUnderTest SystemUnderTest { get; set; }
public string Description { get; set; }
public TExpectedOutput ExpectedOutput { get; set; }
public override object[] ToParameterArray()
{
var output = new object[3];
output[0] = Syste...
Performance - Date.now() vs Date.getTime()
...frozen at the time of its construction (or at whatever time/date it's been set to). That is, if you do this:
var now = new Date();
and then wait a while, a subsequent call to now.getTime() will tell the time at the point the variable was set.
...
Git Bash is extremely slow on Windows 7 x64
...You can significantly speed up Git on Windows by running three commands to set some config options:
git config --global core.preloadindex true
git config --global core.fscache true
git config --global gc.auto 256
Notes:
core.preloadindex does filesystem operations in parallel to hide latency (u...
Getting attribute using XPath
... @KorayTugay, the XPath expression /*/book[1]/title/@lang selects a node-set of 0 or more attribute nodes, while the XPath expression string(/*/book[1]/title/@lang) when evaluated, produces the string value of this node-set -- and this is the string value of the first (in document order) node from...
What is causing “Unable to allocate memory for pool” in PHP?
...APC related.
For the people having this problem, please specify you .ini settings. Specifically your apc.mmap_file_mask setting.
For file-backed mmap, it should be set to something like:
apc.mmap_file_mask=/tmp/apc.XXXXXX
To mmap directly from /dev/zero, use:
apc.mmap_file_mask=/dev/zero
Fo...
Adding a parameter to the URL with JavaScript
...If your expected result is "http://foo.bar/?x=42&y=2"
url.searchParams.set('x', 42);
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R - Markdown avoiding package loading messages
...
@PrasadChalasani knitr::opts_chunk$set(message = FALSE) yihui.name/knitr/options
– Yihui Xie
May 7 '15 at 4:53
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