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How to test if list element exists?
I would like to test if an element of a list exists, here is an example
7 Answers
7
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How to check if an option is selected?
... what you are looking for:
$('#mySelectBox option').each(function() {
if($(this).is(':selected')) ...
The non jQuery (arguably best practice) way to do it would be:
$('#mySelectBox option').each(function() {
if(this.selected) ...
Although, if you are just looking for the selected value...
don't fail jenkins build if execute shell fails
...ild process, I am running a git commit as an execute shell step. However, if there are no changes in the workspace, Jenkins is failing the build. This is because git is returning an error code when there are no changes to commit. I'd like to either abort the build, or just mark it as unstable if t...
How to wait until an element exists?
...ionObserver((mutations) => {
mutations.forEach((mutation) => {
if (!mutation.addedNodes) return
for (let i = 0; i < mutation.addedNodes.length; i++) {
// do things to your newly added nodes here
let node = mutation.addedNodes[i]
}
})
})
observer.observe(documen...
How to calculate number of days between two given dates?
If I have two dates (ex. '8/18/2008' and '9/26/2008' ), what is the best way to get the number of days between these two dates?
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Which is better option to use for dividing an integer number by 2?
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Use the operation that best describes what you are trying to do.
If you are treating the number as a sequence of bits, use bitshift.
If you are treating it as a numerical value, use division.
Note that they are not exactly equivalent. They can give different results for negative integers...
Java default constructor
... you tell me which one of the following is a default constructor and what differentiates it from any other constructor?
13 ...
Show/hide 'div' using JavaScript
...// Show
element.style.display = 'inline-block'; // Show
Alternatively, if you would still like the element to occupy space (like if you were to hide a table cell), you could change the element's visibility property instead:
element.style.visibility = 'hidden'; // Hide
element.style.visibil...
iOS: Use a boolean in NSUserDefaults
...ults standardUserDefaults] synchronize];
and read it by using this code:
if(![[NSUserDefaults standardUserDefaults] boolForKey:@"logged_in"]) {
[self displayLogin];
} else {
[self displayMainScreen];
}
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Check whether a cell contains a substring
Is there an in-built function to check if a cell contains a given character/substring?
9 Answers
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