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How to get the unique ID of an object which overrides hashCode()?
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If you cannot access the source code, just extend from it and use the extended class. Simply quick, easy and dirty solution but it works.
– John Pang
Jan 26 '15 at 7:34
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程序员之网络安全系列（五）：数字证书以及12306的证书问题 - 更多技术 - ...
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Symantec(CA) 把Issuer,公钥A,Subject(一般是网站的域名),Valid from,Valid to等信息以明文的形式写到证书里面，然后用一个指纹算法(SHA1或者MD5 )计算出这些数字证书内容的一个指纹(摘要)，并把指纹和指纹算法用自己的私钥D进行加密，然...
How can I detect if a selector returns null?
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I like to use presence, inspired from Ruby on Rails:
$.fn.presence = function () {
return this.length !== 0 && this;
}
Your example becomes:
alert($('#notAnElement').presence() || "No object found");
I find it superior to the proposed $.fn....
Matching an empty input box using CSS
...ibute was only available in Chrome and Firefox in 2011, and this answer is from 2010. However times have changed and this is no longer the "best" answer, so I have unmarked it as accepted.
– Sjoerd
Apr 12 '17 at 7:47
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Ruby, !! operator (a/k/a the double-bang) [duplicate]
...n negate the negation. It's useful because you can use it to get a boolean from any value. The first ! will convert the argument to a boolean, e.g. true if it's nil or false, and false otherwise. The second will negate that again so that you get the boolean value of the argument, false for nil or fa...
Converting BigDecimal to Integer
...o an int. This conversion is analogous to a narrowing primitive conversion from double to short as defined in the Java Language Specification: any fractional part of this BigDecimal will be discarded, and if the resulting "BigInteger" is too big to fit in an int, only the low-order 32 bits are retur...
Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
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For MAMP
ln -s /Applications/MAMP/tmp/mysql/mysql.sock /tmp/mysql.sock
From https://coderwall.com/p/w5kwzw/solved-can-t-connect-to-local-mysql-server-through-socket-tmp-mysql-sock
UPDATE:
Every time my computer restarts I have to enter this command, so I created a shortcut.
Do the following in...
For..In loops in JavaScript - key value pairs
...k if your target really has that property, rather than having inherited it from its prototype. A bit simpler would be:
for (var k in target){
if (typeof target[k] !== 'function') {
alert("Key is " + k + ", value is" + target[k]);
}
}
It just checks that k is not a method (as if t...
Controlling mouse with Python
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Linux
from Xlib import X, display
d = display.Display()
s = d.screen()
root = s.root
root.warp_pointer(300,300)
d.sync()
Source: Python mouse move in 5 lines of code (Linux only).
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Set the layout weight of a TextView programmatically
... I tried this prior to asking my question. It makes the TextView disappear from the layout. But, on a positive note, I found that setting the stretch_columns property of the TableLayout to 0 causes the effect I'm looking for (TextView's on the left, CheckBoxes on the right). Thanks for the help.
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