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How to easily truncate an array with JavaScript?
... I saw this in a code... But it's the best way (if you are truncating from index 0) davidwalsh.name/empty-array
– kumarharsh
Aug 22 '13 at 13:52
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How to remove a column from an existing table?
...requisites to dropping columns. The columns dropped can't be:
Used by an Index
Used by CHECK, FOREIGN KEY, UNIQUE, or PRIMARY KEY constraints
Associated with a DEFAULT
Bound to a rule
If any of the above are true you need to drop those associations first.
Also, it should be noted, that dropping...
JavaScript loop through json array?
...t least in chrome 30 this works as expected
var logAr = function(element, index, array) {
console.log("a[" + index + "] = " + element);
}
ar.forEach(logAr); // returns a[0] = a, a[1] = b, a[4] = c
Links
see for in at the mdn
the new forEach method
a comment that states that array comprehens...
Properly removing an Integer from a List
...s (please note the naming of the arguments):
remove(Object o)
remove(int index)
That means that list.remove(1) removes the object at position 1 and remove(new Integer(1)) removes the first occurrence of the specified element from this list.
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How do I remove a single file from the staging area (undo git add)?
Situation: I have a Git repository with files already in the index. I make changes to several files, open Git and add these files to my staging area with "git add ."
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mysql update column with value from another table
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@frijj2k would this still be slow if .name is indexed on both tables?
– Steverino
Jan 6 '17 at 17:17
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Get string between two strings in a string
...e of string key : text I want to keep - end of my string";
int pFrom = St.IndexOf("key : ") + "key : ".Length;
int pTo = St.LastIndexOf(" - ");
String result = St.Substring(pFrom, pTo - pFrom);
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Remove Last Comma from a string
...t here
var sentence="I got,. commas, here,";
var pattern=/,/g;
var currentIndex;
while (pattern.test(sentence)==true) {
currentIndex=pattern.lastIndex;
}
if(currentIndex==sentence.trim().length)
alert(sentence.substring(0,currentIndex-1));
else
alert(sentence);
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How to communicate between iframe and the parent site?
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We can even use window.frames[index] to get child frame (<iframe>, <object>, <frame>), equivalent to getElementsByTagName("iframe")[index].contentWindow. To get Parent Window Object from IFrames, it is better to use window.parent, as win...
How to check if the URL contains a given string?
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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...