Original article: http://www.nczonline.net/blog/2012/11/06/ecmascript-6-collections-part-3-weakmaps/
WeakMapSimilar to the conventionalMapThey map a value to a unique key, and then they can be used to obtain the corresponding value.WeakMapAndMapThe difference is that its key can only be the object value, not the original value. Although this restriction looks strange, it is exactly this that makesWeakMapIt
Review the scope, thoroughly understand the operation mechanism of JS;First, before the JS code runs, it will be pre-parsed, at least 2 steps:1, find something---Var, function, parameters and other keywords, before JS run will give them some corresponding actionFor example, the variable will be assigned a value undefined, the content of the function is the whole function block;If a duplicate name is encountered, leave the function, the variable is removed, and if the function names are the same,
has changed, and if _wetness has changed to its maximum range of 0.5, then _snow's proportion is no longer 2/3, but 1/3-increasing the model thickening range by 50%.Here's the final:Source Shader"custom/realistic Snow"{Properties {_maintex ("Base (RGB)", 2D) =" White"{} _bump ("Bump", 2D) ="Bump"{} _snow ("Snow Level", Range (0,1) ) =0_snowcolor ("Snow Color", Color) = (1.0,1.0,1.0,1.0) _snowdirection ("Sn
View class detects that the menu item message is not responded to, the view class submits the menu item message to the doc class of the document class for processing; if the doc class detects that no response is made to the menu item message in the doc class, the doc class returns the menu item message to the View class, and the View class returns it to the cmainframe class for processing. If the cmainframe class shows that the cmainframe class does not respond to the message, it is finally han
algorithm training 6-3 determining character positiontime limit: 1.0s memory limit: 512.0MBReturns the first occurrence of the vowel letter in the given string s. English vowel Letters Only ' a ', ' e ', ' I ', ' o ', ' u ' five.Returns 0 if there is no vowel letter in the string.Only lowercase cases are considered. Sample input and sample Output 1ImportJava.util.Scanner; Public classMain { Public Static vo
With Π/4≈1-1/3 + 1/5-1/7 + ... The formula finds the approximate value of π until the absolute value of an item is found to be less than 10^6. #include "C language" with Π/4≈1-1/3 + 1/5-1/7 + ... The formula finds the approximate value of π until the absolute value of an item is found to be less than 10^6.
Using Newton's Iterative method to find the root of the following equation near 1.5:2x^3-4x^2+3x-6=0
As for the Newton iterative method, in the course of computational methods, the basic formula is:
xn+1=xn-f (Xn)/F *(Xn) xn+1 is the n+1 iteration result,Xn is the nth iteration result,f * ( Xn) is the Guide function value of f (Xn) .
Basic steps:
The first step is to rewrite the equation as polynomial f (
big or it is difficult to see whether it is a multiple of 17, we need to continue the process of "tail truncation, doubling, subtraction, and verification" until we can clearly determine whether it is possible. Another method: if the difference between the last three digits of an integer and the first three digits of an integer can be divisible by 17, then the number can be divisible by 17. Number that can be divisible by 19. If a single digit of an integer is truncated, and then two times of
! Action> idea
Ensure 3 to 5 hours of learning time every day. solve a problem first and write the code manually!
Please take a look at the following articles and videos, which may be helpful to you!
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Yellow brother pytho
Original address: opencv for iOS Study Notes (6)-mark detection 3
Precise marking position
// Adjust the posture of the tag Based on the camera rotation. // marker: the captured tag STD: Rotate (marker. points. begin (), marker. points. begin () + 4-nrotations, marker. points. end ());
After the tags are captured and filtered Based on the tag encoding, we should redefine their corners. This step helps est
Tags: DDE character set ISP 3.x conversion encoding problem problems type diagnosticsMySQL 3.x is known to have some problems with uppercase and lowercase conversions (non-ascii).Problem diagnosis
Please follow the troubleshooting Character encodings page to diagnose the problem.
If the case string encoding diagnostic display is different, then it is possible that your database is causing it.
A ba
Document directory
0: stopped
0: downtime 1: single-user mode, only root for Maintenance 2: multi-user, cannot use net file system3: full multi-user 5: Graphical 4: security mode 6: restart actually, you can view/etc/rc. rc * in d *. d .. Init 0, the corresponding system will run, the program specified in/etc/rc. d/rc0.d. Let's take a look at the name. [Root @ localhost ~] # Ls/etc/rc. d/rc0.d rj1_k35nmb K60crond 1_1_k88iscsi K90network 1_1_k35smb
convert a variable's data type to a string, then num + '; Variable plus an empty string, num is converted to a stringvar typeof (num + ")" string "vartypeof(num-0)" number "Written at the end:Tips: Through the comparison of the good taste of the classroom video and some of the online tutorials (personal blog, Ruan a peak, Masaki, etc.) found that all the data type conversion is not all the case, all in the learning JS, but also need to see their own, more hands-on, so that more accurate and dee
Tags: character wrapper file EMS ASC Rap problem Problems dateMySQL 3.x is known to have some problems with uppercase and lowercase conversions (non-ascii).Problem diagnosis
Please follow the troubleshooting Character encodings page to diagnose the problem.
If the case string encoding diagnostic display is different, then it is possible that your database is causing it.
A bad database casing problem diagnostic input is as follows:Screen: Cod
control element. HTML still uses the above, modify the CSS as follows::checked~#shbox{ opacity:0;}FadeIn ()/fadeout () can control the speed of the fade/fade, and also add transition properties to the #shbox to simulate this effect:#shbox{ transition:opacity 2s;}Operating effect: https://jsfiddle.net/dwqs/2txfyr1e/embedded/result/Implementation of Slideup ()/slidedown ()Slideup ()/slidedown () enables roll-up and drop-down by changing the height of the element. HTML still uses the above,
(No. 00005) iOS pop-up games (6): Game data initialization (3)
Now let's take a look at the randomCreateMap Method for initializing the map:
// Create a level map randomly based on the current level data on the blank map // The total number of blocks on the map is 30x10 = 300, and the Wall that cannot be moved is discarded (48) 252 spaces left. // subtract the space occupied by the player and the enemy.
= tex2d (_maintex, In.uv_maintex); O. Albedo = C.rgb;o. Alpha = C.A;} ENDCG} FallBack "Diffuse"}Select the new Shader in the Material, and then drag the material to a point near the Sphere body, you will find the original near a point of the Sphere is a little farther Sphere covered!Unity provides a number of default render queues.Background: Background, first rendered, used for sky boxes, etc. Render Queue Value =1000Geometry: Geometry, default render queue, for most objects, opaque geometry U
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