shift

Is the shiftkey held down in JavaScript

由 ◇◆丶佛笑我妖孽 提交于 2019-11-28 04:25:50
问题 I have written a JS function that only allow numbers to be entered. A copy of that function is below: function NumbersOnly(e) { var evt = e || window.event; if (evt) { var keyCode = evt.charCode || evt.keyCode; //Allow tab, backspace and numbers to be pressed, otherwise return false for everything. //(keyCode>=96 && keyCode<=105) are the numpad numbers if ((keyCode >= 48 && keyCode <= 57) || (keyCode >= 96 && keyCode <= 105) || keyCode === 9 || keyCode === 8) { } else { evt.returnValue =

Move column by name to front of table in pandas

由 删除回忆录丶 提交于 2019-11-28 03:32:44
Here is my df: Net Upper Lower Mid Zsore Answer option More than once a day 0% 0.22% -0.12% 2 65 Once a day 0% 0.32% -0.19% 3 45 Several times a week 2% 2.45% 1.10% 4 78 Once a week 1% 1.63% -0.40% 6 65 How can I move a column by name ("Mid") to the front of the table, index 0. This is what it needs to look like: Mid Upper Lower Net Zsore Answer option More than once a day 2 0.22% -0.12% 0% 65 Once a day 3 0.32% -0.19% 0% 45 Several times a week 4 2.45% 1.10% 2% 78 Once a week 6 1.63% -0.40% 1% 65 My current code moves the column by index via "df.columns.tolist()" but Id like to shift it by

Google Chrome console.log out of sequence? [duplicate]

由 蹲街弑〆低调 提交于 2019-11-28 01:01:24
问题 This question already has an answer here: Is Chrome's JavaScript console lazy about evaluating arrays? 6 answers Can someone explain the following two outputs? Code 1: console.log(itemsAry); //loadNextItem(); function loadNextItem(){ var item = itemsAry.shift(); console.log(item); } Result: ["cat-53", "cat-57", "cat-51", "cat-10", "cat-55", "cat-56", "cat-5", "cat-50", "cat-3", "cat-54", "cat-52", "cat-9", "cat-8", "cat-4", "cat-58", "cat-6", "cat-7"] (as expected). Code 2: console.log

Is left-shifting a signed integer undefined behavior in C++03?

由 我是研究僧i 提交于 2019-11-27 23:20:18
问题 According to C++03, 5.8/2, left-shifting is defined as follows: The value of E1 << E2 is E1 (interpreted as a bit pattern) left-shifted E2 bit positions; vacated bits are zero-filled. If E1 has an unsigned type, the value of the result is E1 multiplied by the quantity 2 raised to the power E2, reduced modulo ULONG_MAX+1 if E1 has type unsigned long, UINT_MAX+1 otherwise. What bothers me here is that unsigned types are explicitly mentioned yet signed types are ignored completely. Compare this

How to press “Ctrl+Shift+Q” in AutoIt

由 帅比萌擦擦* 提交于 2019-11-27 16:27:58
I have an application which has a shortcut key Ctrl + Shift + Q to quit it. I want to press Ctrl + Shift + Q via AutoIt to exit my application. I tried it as below: Send("{LCTRL} {LSHIFT} Q") and ControlSend("{LCTRL} {LSHIFT} Q") But none of them did work. Please guide me to do it the right way. Abi You want something like: Send("{CTRLDOWN}{SHIFTDOWN}q{CTRLUP}{SHIFTUP}") What you are sending presses the keys individually in sequence, rather than chaining them together. Hope that helps! Source: www.autoitscript.com Please use the below option Send("^+{F}") The keylists are available in the

Comparing previous row values in Pandas DataFrame

由 允我心安 提交于 2019-11-27 10:21:28
问题 import pandas as pd data={'col1':[1,3,3,1,2,3,2,2]} df=pd.DataFrame(data,columns=['col1']) print df col1 0 1 1 3 2 3 3 1 4 2 5 3 6 2 7 2 I have the following Pandas DataFrame and I want to create another column that compares the previous row of col1 to see if they are equal. What would be the best way to do this? It would be like the following DataFrame. Thanks col1 match 0 1 False 1 3 False 2 3 True 3 1 False 4 2 False 5 3 False 6 2 False 7 2 True 回答1: You need eq with shift: df['match'] =

PHP: 'rotate' an array?

由 烈酒焚心 提交于 2019-11-27 09:13:49
is it possible to easily 'rotate' an array in PHP ? Like this: 1, 2, 3, 4 -> 2, 3 ,4 ,1 Is there some kind of built-in PHP function for this? Most of the current answers are correct, but only if you don't care about your indices: $arr = array('foo' => 'bar', 'baz' => 'qux', 'wibble' => 'wobble'); array_push($arr, array_shift($arr)); print_r($arr); Output: Array ( [baz] => qux [wibble] => wobble [0] => bar ) To preserve your indices you can do something like: $arr = array('foo' => 'bar', 'baz' => 'qux', 'wibble' => 'wobble'); $keys = array_keys($arr); $val = $arr[$keys[0]]; unset($arr[$keys[0]]

Detect CTRL and SHIFT key without keydown event?

由 Deadly 提交于 2019-11-27 06:58:07
问题 I've been wondering if I can detect CTRL and SHIFT key being pressed WITHOUT using keydown event. The reason is that I am creating some sort of Grid Viewer in JavaScript, and I implemented selecting different items by holding CTRL or SHIFT key as it functions in most common viewers, editors and so on. The problem is that when the focus is not anywhere on the page. For example I'm adding page to the bookmarks. Then I hold CTRL or SHIFT and click on the item, but it acts normally as keydown

c get nth byte of integer

由 試著忘記壹切 提交于 2019-11-26 21:56:46
I know you can get the first byte by using int x = number & ((1<<8)-1); or int x = number & 0xFF; But I don't know how to get the nth byte of an integer. For example, 1234 is 00000000 00000000 00000100 11010010 as 32bit integer How can I get all of those bytes? first one would be 210, second would be 4 and the last two would be 0. int x = (number >> (8*n)) & 0xff; where n is 0 for the first byte, 1 for the second byte, etc. For the (n+1)th byte in whatever order they appear in memory (which is also least- to most- significant on little-endian machines like x86): int x = ((unsigned char *)(

Disable New Line in Textarea when Pressed ENTER

由 喜夏-厌秋 提交于 2019-11-26 21:29:29
问题 I am calling a function whenever someone press enter in the textarea . Now I want to disable new line or break when enter is pressed. So new line should work when shift + enter is pressed. In that case, the function should not be called. Here is jsfiddle demo: http://jsfiddle.net/bxAe2/14/ 回答1: try this $("textarea").keydown(function(e){ // Enter was pressed without shift key if (e.keyCode == 13 && !e.shiftKey) { // prevent default behavior e.preventDefault(); } }); update your fiddle to $("
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